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UD for Yorùbá

Tokenization and Word Segmentation

• Following most tokenization patterns, words are delimited by whitespace. Generally, words are delimited by whitespace or punctuation except:
  • Hyphenated words that cannot be correctly annotated when split (níhìn-ín) are not split.
  • Multiword tokens are not used in Yorùbá; “what you see is what you tokenize”. Contractions are not undone for words that can be correctly assigned a category.

Morphology

Tags

• Yorùbá uses 15 universal tags (SYM and INTJ do not occur in the corpus at present).
• The only word tagged as PART is the negation marker kò.
• Auxiliary verbs (AUX) are grouped to:
  • jẹ́ (copular “be”)
  • ní (copular “be”)
  • kí follows jẹ́ in constructions that can be understood as third-person existential imperatives (“let there be light”); it is semantically and syntactically redundant, but currently we tag it as auxiliary, together with jẹ́
  • kìí – negative habitual (“usually be/do not”)
  • ń – imperfective or progressive aspect
  • ti – perfective aspect (“have”)
  • yóò, máa, á, a, ó, yió – future tense (“shall, will”)
  • ìbá, ì bá – conditional (“would”); written as one word in old texts, modern spelling is ì bá
  • lè – modal “can, may”
  • gbọdọ̀ – modal “must”
  • má, máà – negative “do not” (cf. the negative particle kò)
• The tag DET is used for articles and pronominal words used with a determiner function; they can precede or follow the noun they quantify. The tag PRON is used for subjects or objects of a noun phrase and to show possession.
  • A word can belong to both categories DET and PRON: (àwọn) is tagged DET when used as a pluralizer of a nominal.
  • Gender of a pronoun is only determined by the antecedent (ó – can be he, she or it). It is not explicitly stated.
• Polysemy is an important phenomenon in Yorùbá, to correctly categorize a word, the context where it occurs is the determining factor. Tone can distinguish meaning but a word with the same tone can mean different things in different circumstance (e.g. bí - “procreate”, “if”, “not” )

Features

• The pluralizing determiner àwọn is tagged Number=Plur|PronType=Dem.
• The numeral tag NUM is used for quantity. Number words follow words they quantify.
• Adjectives agree with nouns (in attributive position) and they only have the positive Degree.
• There is no morphological Case; instead, adpositions (ADP) are used as case markers and specify the role of a noun in a phrase.
• Verb forms are past/perfect (ti), continuous (preverbial particle - ń), future (yóò). Verb serialization is prominent in Yorùbá, the first verb marks tense while the second indicates the direction of an action.

Syntax

• Yorùbá is an SVO language with a strict word order.

Subjects

• Nominal subjects are in initial position followed by adjectives, demonstrative and relative clauses.
• Nominal subject (nsubj) is a noun phrase without preposition.
• A finite subordinate clause may serve as the subject and is labeled csubj.

Objects

• Objects follow the main verb.

• When a verb has two objects, the second one is preceded by a preposition and therefore labeled as oblique (obl).

• Verb phrases and prepositional phrases are also head initial.

Yoruba uses 2 relation subtypes:

• compound:prt to attach verbal particles to verbs
• compound:svc to connect verbs in a serial verb construction

---

Treebanks

There is only one Yorùbá UD treebank at present:

• Yoruba-YTB

More

This section will probably be moved to a separate page. Examples are taken from the Language Gulper.

The default interpretation of the bare verb stem is the past tense.

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input
    
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info
  
Olú ra aga \n Olú buy chair
nsubj(ra, Olú)
obj(ra, aga)
{
    "text": "Olú ra aga \n Olú buy chair ",
    "entities": [
        [ "embedded-1-T1", "token", [ [ 0, 3 ] ] ],
        [ "embedded-1-T2", "token", [ [ 4, 6 ] ] ],
        [ "embedded-1-T3", "token", [ [ 7, 10 ] ] ],
        [ "embedded-1-T5", "token", [ [ 13, 16 ] ] ],
        [ "embedded-1-T6", "token", [ [ 17, 20 ] ] ],
        [ "embedded-1-T7", "token", [ [ 21, 26 ] ] ]
    ],
    "relations": [
        [ "embedded-1-R1", "nsubj", [ [ "arg1", "embedded-1-T2" ], [ "arg2", "embedded-1-T1" ] ] ],
        [ "embedded-1-R2", "obj", [ [ "arg1", "embedded-1-T2" ], [ "arg2", "embedded-1-T3" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "1" ]
}

“Olu bought a chair.”

The imperfective auxiliary ń is used to refer to an action in progress in the past or present, or to a habitual action.

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input
    
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info
  
Wọ́n ń jó \n They IMPF play
nsubj(jó, Wọ́n)
aux(jó, ń)
{
    "text": "Wọ́n ń jó \n They IMPF play ",
    "entities": [
        [ "embedded-2-T1", "token", [ [ 0, 4 ] ] ],
        [ "embedded-2-T2", "token", [ [ 5, 6 ] ] ],
        [ "embedded-2-T3", "token", [ [ 7, 9 ] ] ],
        [ "embedded-2-T5", "token", [ [ 12, 16 ] ] ],
        [ "embedded-2-T6", "token", [ [ 17, 21 ] ] ],
        [ "embedded-2-T7", "token", [ [ 22, 26 ] ] ]
    ],
    "relations": [
        [ "embedded-2-R1", "nsubj", [ [ "arg1", "embedded-2-T3" ], [ "arg2", "embedded-2-T1" ] ] ],
        [ "embedded-2-R2", "aux", [ [ "arg1", "embedded-2-T3" ], [ "arg2", "embedded-2-T2" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "2" ]
}

“They are (were) playing.”

The perfective auxiliary ti denotes a completed action.

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input
    
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info
  
Ó ti lọ \n He/she PERF go
nsubj(lọ, Ó)
aux(lọ, ti)
{
    "text": "Ó ti lọ \n He PERF go ",
    "entities": [
        [ "embedded-3-T1", "token", [ [ 0, 1 ] ] ],
        [ "embedded-3-T2", "token", [ [ 2, 4 ] ] ],
        [ "embedded-3-T3", "token", [ [ 5, 7 ] ] ],
        [ "embedded-3-T5", "she", [ [ 10, 12 ] ] ],
        [ "embedded-3-T6", "token", [ [ 13, 17 ] ] ],
        [ "embedded-3-T7", "token", [ [ 18, 20 ] ] ]
    ],
    "relations": [
        [ "embedded-3-R1", "nsubj", [ [ "arg1", "embedded-3-T3" ], [ "arg2", "embedded-3-T1" ] ] ],
        [ "embedded-3-R2", "aux", [ [ "arg1", "embedded-3-T3" ], [ "arg2", "embedded-3-T2" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "3" ]
}

“He/she has gone.”

The auxiliaries á/ó/yió denote the future tense.

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input
    
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info
  
ọ̀rẹ́ mi á lọ \n friend my FUT go
nmod(ọ̀rẹ́, mi)
nsubj(lọ, ọ̀rẹ́)
aux(lọ, á)
{
    "text": "ọ̀rẹ́ mi á lọ \n friend my FUT go ",
    "entities": [
        [ "embedded-4-T1", "token", [ [ 0, 5 ] ] ],
        [ "embedded-4-T2", "token", [ [ 6, 8 ] ] ],
        [ "embedded-4-T3", "token", [ [ 9, 10 ] ] ],
        [ "embedded-4-T4", "token", [ [ 11, 13 ] ] ],
        [ "embedded-4-T6", "token", [ [ 16, 22 ] ] ],
        [ "embedded-4-T7", "token", [ [ 23, 25 ] ] ],
        [ "embedded-4-T8", "token", [ [ 26, 29 ] ] ],
        [ "embedded-4-T9", "token", [ [ 30, 32 ] ] ]
    ],
    "relations": [
        [ "embedded-4-R1", "nmod", [ [ "arg1", "embedded-4-T1" ], [ "arg2", "embedded-4-T2" ] ] ],
        [ "embedded-4-R2", "nsubj", [ [ "arg1", "embedded-4-T4" ], [ "arg2", "embedded-4-T1" ] ] ],
        [ "embedded-4-R3", "aux", [ [ "arg1", "embedded-4-T4" ], [ "arg2", "embedded-4-T3" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "4" ]
}

“My friend will go.”

A combination of the imperfective/progressive and perfective auxiliaries indicates the beginning of an action in the past (progressive perfect).

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input
    
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info
  
Mo ti ń gba lẹ́tà rẹ \n I PERF IMPF receive letter your
nsubj(gba, Mo)
aux(gba, ti)
aux(gba, ń)
obj(gba, lẹ́tà)
nmod(lẹ́tà, rẹ)
{
    "text": "Mo ti ń gba lẹ́tà rẹ \n I PERF IMPF receive letter your ",
    "entities": [
        [ "embedded-5-T1", "token", [ [ 0, 2 ] ] ],
        [ "embedded-5-T2", "token", [ [ 3, 5 ] ] ],
        [ "embedded-5-T3", "token", [ [ 6, 7 ] ] ],
        [ "embedded-5-T4", "token", [ [ 8, 11 ] ] ],
        [ "embedded-5-T5", "token", [ [ 12, 17 ] ] ],
        [ "embedded-5-T6", "token", [ [ 18, 20 ] ] ],
        [ "embedded-5-T8", "token", [ [ 23, 24 ] ] ],
        [ "embedded-5-T9", "token", [ [ 25, 29 ] ] ],
        [ "embedded-5-T10", "token", [ [ 30, 34 ] ] ],
        [ "embedded-5-T11", "token", [ [ 35, 42 ] ] ],
        [ "embedded-5-T12", "token", [ [ 43, 49 ] ] ],
        [ "embedded-5-T13", "token", [ [ 50, 54 ] ] ]
    ],
    "relations": [
        [ "embedded-5-R1", "nsubj", [ [ "arg1", "embedded-5-T4" ], [ "arg2", "embedded-5-T1" ] ] ],
        [ "embedded-5-R2", "aux", [ [ "arg1", "embedded-5-T4" ], [ "arg2", "embedded-5-T2" ] ] ],
        [ "embedded-5-R3", "aux", [ [ "arg1", "embedded-5-T4" ], [ "arg2", "embedded-5-T3" ] ] ],
        [ "embedded-5-R4", "obj", [ [ "arg1", "embedded-5-T4" ], [ "arg2", "embedded-5-T5" ] ] ],
        [ "embedded-5-R5", "nmod", [ [ "arg1", "embedded-5-T5" ], [ "arg2", "embedded-5-T6" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "5" ]
}

“I have started to receive your letters.”

If the verb has two objects, the second one is preceded by the preposition ní. Therefore the second object is treated as an oblique argument in UD.

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input
    
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info
  
Ó kọ wa ní Yorùbá \n He teach us to Yoruba
nsubj(kọ, Ó)
obj(kọ, wa)
obl(kọ, Yorùbá)
case(Yorùbá, ní)
{
    "text": "Ó kọ wa ní Yorùbá \n He teach us to Yoruba ",
    "entities": [
        [ "embedded-6-T1", "token", [ [ 0, 1 ] ] ],
        [ "embedded-6-T2", "token", [ [ 2, 4 ] ] ],
        [ "embedded-6-T3", "token", [ [ 5, 7 ] ] ],
        [ "embedded-6-T4", "token", [ [ 8, 10 ] ] ],
        [ "embedded-6-T5", "token", [ [ 11, 17 ] ] ],
        [ "embedded-6-T7", "token", [ [ 20, 22 ] ] ],
        [ "embedded-6-T8", "token", [ [ 23, 28 ] ] ],
        [ "embedded-6-T9", "token", [ [ 29, 31 ] ] ],
        [ "embedded-6-T10", "token", [ [ 32, 34 ] ] ],
        [ "embedded-6-T11", "token", [ [ 35, 41 ] ] ]
    ],
    "relations": [
        [ "embedded-6-R1", "nsubj", [ [ "arg1", "embedded-6-T2" ], [ "arg2", "embedded-6-T1" ] ] ],
        [ "embedded-6-R2", "obj", [ [ "arg1", "embedded-6-T2" ], [ "arg2", "embedded-6-T3" ] ] ],
        [ "embedded-6-R3", "obl", [ [ "arg1", "embedded-6-T2" ], [ "arg2", "embedded-6-T5" ] ] ],
        [ "embedded-6-R4", "case", [ [ "arg1", "embedded-6-T5" ], [ "arg2", "embedded-6-T4" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "6" ]
}

“He taught us Yoruba.”

There are serial verb constructions, in which several verbs appear in a sequence without any intervening coordinator or subordinator. They share tense-aspect markers if any, and they may share arguments, although an argument may have different roles with respect to different verbs in the chain. Some of these constructions could be annotated as either compound:svc or xcomp. Precise criteria have yet to be formulated.

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input
    
brat
    
info
  
Ó gbé e wá \n He/she carry it come
nsubj(gbé, Ó)
obj(gbé, e)
compound:svc(gbé, wá)
{
    "text": "Ó gbé e wá \n He carry it come ",
    "entities": [
        [ "embedded-7-T1", "token", [ [ 0, 1 ] ] ],
        [ "embedded-7-T2", "token", [ [ 2, 5 ] ] ],
        [ "embedded-7-T3", "token", [ [ 6, 7 ] ] ],
        [ "embedded-7-T4", "token", [ [ 8, 10 ] ] ],
        [ "embedded-7-T6", "she", [ [ 13, 15 ] ] ],
        [ "embedded-7-T7", "token", [ [ 16, 21 ] ] ],
        [ "embedded-7-T8", "token", [ [ 22, 24 ] ] ],
        [ "embedded-7-T9", "token", [ [ 25, 29 ] ] ]
    ],
    "relations": [
        [ "embedded-7-R1", "nsubj", [ [ "arg1", "embedded-7-T2" ], [ "arg2", "embedded-7-T1" ] ] ],
        [ "embedded-7-R2", "obj", [ [ "arg1", "embedded-7-T2" ], [ "arg2", "embedded-7-T3" ] ] ],
        [ "embedded-7-R3", "compound:svc", [ [ "arg1", "embedded-7-T2" ], [ "arg2", "embedded-7-T4" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "7" ]
}

“He/she brought it.”

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brat
    
info
  
Ó tì mí ṣubú \n He/she push me fall
nsubj(tì, Ó)
obj(tì, mí)
compound:svc(tì, ṣubú)
{
    "text": "Ó tì mí ṣubú \n He push me fall ",
    "entities": [
        [ "embedded-8-T1", "token", [ [ 0, 1 ] ] ],
        [ "embedded-8-T2", "token", [ [ 2, 4 ] ] ],
        [ "embedded-8-T3", "token", [ [ 5, 7 ] ] ],
        [ "embedded-8-T4", "token", [ [ 8, 12 ] ] ],
        [ "embedded-8-T6", "she", [ [ 15, 17 ] ] ],
        [ "embedded-8-T7", "token", [ [ 18, 22 ] ] ],
        [ "embedded-8-T8", "token", [ [ 23, 25 ] ] ],
        [ "embedded-8-T9", "token", [ [ 26, 30 ] ] ]
    ],
    "relations": [
        [ "embedded-8-R1", "nsubj", [ [ "arg1", "embedded-8-T2" ], [ "arg2", "embedded-8-T1" ] ] ],
        [ "embedded-8-R2", "obj", [ [ "arg1", "embedded-8-T2" ], [ "arg2", "embedded-8-T3" ] ] ],
        [ "embedded-8-R3", "compound:svc", [ [ "arg1", "embedded-8-T2" ], [ "arg2", "embedded-8-T4" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "8" ]
}

“He/she pushed me and I fell.”

Two transitive verbs combined may have each their own object.

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info
  
Ó pọn omi kún kete \n He/she draw water fill pot
nsubj(pọn, Ó)
obj(pọn, omi)
compound:svc(pọn, kún)
obj(kún, kete)
{
    "text": "Ó pọn omi kún kete \n He draw water fill pot ",
    "entities": [
        [ "embedded-9-T1", "token", [ [ 0, 1 ] ] ],
        [ "embedded-9-T2", "token", [ [ 2, 5 ] ] ],
        [ "embedded-9-T3", "token", [ [ 6, 9 ] ] ],
        [ "embedded-9-T4", "token", [ [ 10, 13 ] ] ],
        [ "embedded-9-T5", "token", [ [ 14, 18 ] ] ],
        [ "embedded-9-T7", "she", [ [ 21, 23 ] ] ],
        [ "embedded-9-T8", "token", [ [ 24, 28 ] ] ],
        [ "embedded-9-T9", "token", [ [ 29, 34 ] ] ],
        [ "embedded-9-T10", "token", [ [ 35, 39 ] ] ],
        [ "embedded-9-T11", "token", [ [ 40, 43 ] ] ]
    ],
    "relations": [
        [ "embedded-9-R1", "nsubj", [ [ "arg1", "embedded-9-T2" ], [ "arg2", "embedded-9-T1" ] ] ],
        [ "embedded-9-R2", "obj", [ [ "arg1", "embedded-9-T2" ], [ "arg2", "embedded-9-T3" ] ] ],
        [ "embedded-9-R3", "compound:svc", [ [ "arg1", "embedded-9-T2" ], [ "arg2", "embedded-9-T4" ] ] ],
        [ "embedded-9-R4", "obj", [ [ "arg1", "embedded-9-T4" ], [ "arg2", "embedded-9-T5" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "9" ]
}

“He/she drew water and filled the pot.”

But there can also be one shared object:

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brat
    
info
  
Ade ń ra ẹran jẹ \n Ade IMPF buy meat eat
nsubj(ra, Ade)
aux(ra, ń)
obj(ra, ẹran)
compound:svc(ra, jẹ)
{
    "text": "Ade ń ra ẹran jẹ \n Ade IMPF buy meat eat ",
    "entities": [
        [ "embedded-10-T1", "token", [ [ 0, 3 ] ] ],
        [ "embedded-10-T2", "token", [ [ 4, 5 ] ] ],
        [ "embedded-10-T3", "token", [ [ 6, 8 ] ] ],
        [ "embedded-10-T4", "token", [ [ 9, 13 ] ] ],
        [ "embedded-10-T5", "token", [ [ 14, 16 ] ] ],
        [ "embedded-10-T7", "token", [ [ 19, 22 ] ] ],
        [ "embedded-10-T8", "token", [ [ 23, 27 ] ] ],
        [ "embedded-10-T9", "token", [ [ 28, 31 ] ] ],
        [ "embedded-10-T10", "token", [ [ 32, 36 ] ] ],
        [ "embedded-10-T11", "token", [ [ 37, 40 ] ] ]
    ],
    "relations": [
        [ "embedded-10-R1", "nsubj", [ [ "arg1", "embedded-10-T3" ], [ "arg2", "embedded-10-T1" ] ] ],
        [ "embedded-10-R2", "aux", [ [ "arg1", "embedded-10-T3" ], [ "arg2", "embedded-10-T2" ] ] ],
        [ "embedded-10-R3", "obj", [ [ "arg1", "embedded-10-T3" ], [ "arg2", "embedded-10-T4" ] ] ],
        [ "embedded-10-R4", "compound:svc", [ [ "arg1", "embedded-10-T3" ], [ "arg2", "embedded-10-T5" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "10" ]
}

“Ade is buying meat and eating it.”

In focus constructions, a constituent is placed at the front and marked by the morpheme ni. Normal sentence without focus:

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input
    
brat
    
info
  
Olú ra ìwé \n Olú buy book
nsubj(ra, Olú)
obj(ra, ìwé)
{
    "text": "Olú ra ìwé \n Olú buy book ",
    "entities": [
        [ "embedded-11-T1", "token", [ [ 0, 3 ] ] ],
        [ "embedded-11-T2", "token", [ [ 4, 6 ] ] ],
        [ "embedded-11-T3", "token", [ [ 7, 10 ] ] ],
        [ "embedded-11-T5", "token", [ [ 13, 16 ] ] ],
        [ "embedded-11-T6", "token", [ [ 17, 20 ] ] ],
        [ "embedded-11-T7", "token", [ [ 21, 25 ] ] ]
    ],
    "relations": [
        [ "embedded-11-R1", "nsubj", [ [ "arg1", "embedded-11-T2" ], [ "arg2", "embedded-11-T1" ] ] ],
        [ "embedded-11-R2", "obj", [ [ "arg1", "embedded-11-T2" ], [ "arg2", "embedded-11-T3" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "11" ]
}

“Olú bought a book.”

Object focus:

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info
  
Ìwé ni Olú rà \n Book FOC Olú buy
nsubj(rà, Olú)
obj(rà, Ìwé)
case(Ìwé, ni)
{
    "text": "Ìwé ni Olú rà \n Book FOC Olú buy ",
    "entities": [
        [ "embedded-12-T1", "token", [ [ 0, 3 ] ] ],
        [ "embedded-12-T2", "token", [ [ 4, 6 ] ] ],
        [ "embedded-12-T3", "token", [ [ 7, 10 ] ] ],
        [ "embedded-12-T4", "token", [ [ 11, 13 ] ] ],
        [ "embedded-12-T6", "token", [ [ 16, 20 ] ] ],
        [ "embedded-12-T7", "token", [ [ 21, 24 ] ] ],
        [ "embedded-12-T8", "token", [ [ 25, 28 ] ] ],
        [ "embedded-12-T9", "token", [ [ 29, 32 ] ] ]
    ],
    "relations": [
        [ "embedded-12-R1", "nsubj", [ [ "arg1", "embedded-12-T4" ], [ "arg2", "embedded-12-T3" ] ] ],
        [ "embedded-12-R2", "obj", [ [ "arg1", "embedded-12-T4" ], [ "arg2", "embedded-12-T1" ] ] ],
        [ "embedded-12-R3", "case", [ [ "arg1", "embedded-12-T1" ], [ "arg2", "embedded-12-T2" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "12" ]
}

“It was a book that Olú bought.”

If the subject is focused, there must be a pronoun at the subject position. We treat this as an instance of clitic doubling: the fronted noun phrase is analyzed as the subject, and the pronoun is attached as an expletive:

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input
    
brat
    
info
  
Olú ni ó ra ìwé \n Olú FOC he buy book
nsubj(ra, Olú)
case(Olú, ni)
expl(ra, ó)
obj(ra, ìwé)
{
    "text": "Olú ni ó ra ìwé \n Olú FOC he buy book ",
    "entities": [
        [ "embedded-13-T1", "token", [ [ 0, 3 ] ] ],
        [ "embedded-13-T2", "token", [ [ 4, 6 ] ] ],
        [ "embedded-13-T3", "token", [ [ 7, 8 ] ] ],
        [ "embedded-13-T4", "token", [ [ 9, 11 ] ] ],
        [ "embedded-13-T5", "token", [ [ 12, 15 ] ] ],
        [ "embedded-13-T7", "token", [ [ 18, 21 ] ] ],
        [ "embedded-13-T8", "token", [ [ 22, 25 ] ] ],
        [ "embedded-13-T9", "token", [ [ 26, 28 ] ] ],
        [ "embedded-13-T10", "token", [ [ 29, 32 ] ] ],
        [ "embedded-13-T11", "token", [ [ 33, 37 ] ] ]
    ],
    "relations": [
        [ "embedded-13-R1", "nsubj", [ [ "arg1", "embedded-13-T4" ], [ "arg2", "embedded-13-T1" ] ] ],
        [ "embedded-13-R2", "case", [ [ "arg1", "embedded-13-T1" ], [ "arg2", "embedded-13-T2" ] ] ],
        [ "embedded-13-R3", "expl", [ [ "arg1", "embedded-13-T4" ], [ "arg2", "embedded-13-T3" ] ] ],
        [ "embedded-13-R4", "obj", [ [ "arg1", "embedded-13-T4" ], [ "arg2", "embedded-13-T5" ] ] ]
    ],
    "attributes": [],
    "error": false,
    "sentlabels": [ "13" ]
}

“It was Olú who bought the book.”

Oblique dependent focus:

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input
    
brat
    
info
  
Ní ilé ni ó ti bẹ̀rẹ̀ \n At house FOC it PERF start
case(ilé, Ní)
case(ilé, ni)
obl(bẹ̀rẹ̀, ilé)
nsubj(bẹ̀rẹ̀, ó)
aux(bẹ̀rẹ̀, ti)
{
    "text": "Ní ilé ni ó ti bẹ̀rẹ̀ \n At house FOC it PERF start ",
    "entities": [
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“It was in the house that it started.”

The verb can be fronted in its nominalized form. It must be then repeated as a verb.

edit

  

    
input
    
brat
    
info
  
Rírà ni bàbá ra bàtà \n Buying FOC father buy shoes
case(Rírà, ni)
dislocated(ra, Rírà)
nsubj(ra, bàbá)
obj(ra, bàtà)
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}

“Father bought shoes.”

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