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xcomp: open clausal complement

An open clausal complement (xcomp) of a verb or an adjective is a predicative or clausal complement without its own subject. The reference of the subject is necessarily determined by an argument external to the xcomp (normally by the object of the next higher clause, if there is one, or else by the subject of the next higher clause. These complements are always non-finite, and they are complements (arguments of the higher verb or adjective) rather than adjuncts/modifiers, such as a purpose clause. The name xcomp is borrowed from Lexical-Functional Grammar.

He says that you like to swim
xcomp(like, swim)
Sue asked George to respond to her offer
xcomp(asked, respond)
I consider him a fool
xcomp(consider, fool)
I consider him honest
xcomp(consider, honest)
She looks very beautiful
xcomp(looks, beautiful)

Treebank Statistics (UD_English)

This relation is universal.

3570 nodes (1%) are attached to their parents as xcomp.

3559 instances of xcomp (100%) are left-to-right (parent precedes child). Average distance between parent and child is 2.41344537815126.

The following 25 pairs of parts of speech are connected with xcomp: en-pos/VERB-en-pos/VERB (2339; 66% instances), en-pos/VERB-en-pos/ADJ (655; 18% instances), en-pos/ADJ-en-pos/VERB (236; 7% instances), en-pos/VERB-en-pos/NOUN (187; 5% instances), en-pos/VERB-en-pos/PROPN (66; 2% instances), en-pos/VERB-en-pos/ADV (24; 1% instances), en-pos/VERB-en-pos/PART (13; 0% instances), en-pos/VERB-en-pos/NUM (9; 0% instances), en-pos/VERB-en-pos/PRON (7; 0% instances), en-pos/ADV-en-pos/VERB (5; 0% instances), en-pos/AUX-en-pos/VERB (5; 0% instances), en-pos/ADJ-en-pos/PART (4; 0% instances), en-pos/ADJ-en-pos/ADJ (3; 0% instances), en-pos/ADJ-en-pos/NOUN (3; 0% instances), en-pos/VERB-en-pos/DET (3; 0% instances), en-pos/PRON-en-pos/VERB (2; 0% instances), en-pos/AUX-en-pos/ADJ (1; 0% instances), en-pos/NOUN-en-pos/VERB (1; 0% instances), en-pos/NUM-en-pos/VERB (1; 0% instances), en-pos/PRON-en-pos/NOUN (1; 0% instances), en-pos/PROPN-en-pos/X (1; 0% instances), en-pos/SYM-en-pos/VERB (1; 0% instances), en-pos/VERB-en-pos/ADP (1; 0% instances), en-pos/VERB-en-pos/AUX (1; 0% instances), en-pos/VERB-en-pos/SYM (1; 0% instances).

# visual-style 13	bgColor:blue
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# visual-style 11	bgColor:blue
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# visual-style 11 13 xcomp	color:blue
1	When	when	ADV	WRB	PronType=Int	3	mark	_	_
2	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	3	nsubj	_	_
3	saw	see	VERB	VBD	Mood=Ind|Tense=Past|VerbForm=Fin	11	advcl	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	cartoon	cartoon	NOUN	NN	Number=Sing	3	dobj	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	their	they	PRON	PRP$	Number=Plur|Person=3|Poss=Yes|PronType=Prs	8	nmod:poss	_	_
8	prophet	prophet	NOUN	NN	Number=Sing	5	nmod	_	SpaceAfter=No
9	,	,	PUNCT	,	_	11	punct	_	_
10	people	people	NOUN	NNS	Number=Plur	11	nsubj	_	_
11	had	have	VERB	VBD	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
12	to	to	PART	TO	_	13	mark	_	_
13	die	die	VERB	VB	VerbForm=Inf	11	xcomp	_	SpaceAfter=No
14	.	.	PUNCT	.	_	11	punct	_	_

# visual-style 8	bgColor:blue
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# visual-style 3	bgColor:blue
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# visual-style 3 8 xcomp	color:blue
1	i	i	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	3	nsubj	_	_
2	am	be	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	3	aux	_	_
3	going	go	VERB	VBG	VerbForm=Ger	0	root	_	_
4	out	out	ADV	RB	_	3	advmod	_	_
5	tonight	tonight	NOUN	NN	Number=Sing	3	nmod:tmod	_	_
6	to	to	PART	TO	_	8	mark	_	_
7	get	get	VERB	VB	VerbForm=Inf	8	aux	_	_
8	wasted	wasted	ADJ	JJ	Degree=Pos	3	xcomp	_	_
9	if	if	SCONJ	IN	_	12	mark	_	_
10	anyone	anyone	NOUN	NN	Number=Sing	12	nsubj	_	_
11	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
12	interested	interested	ADJ	JJ	Degree=Pos	3	advcl	_	SpaceAfter=No
13	.	.	PUNCT	.	_	3	punct	_	_

# visual-style 9	bgColor:blue
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# visual-style 7	bgColor:blue
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# visual-style 7 9 xcomp	color:blue
1	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	following	follow	VERB	VBG	VerbForm=Ger	3	amod	_	_
3	weekend	weekend	NOUN	NN	Number=Sing	7	nmod:tmod	_	_
4	i	i	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	7	nsubj	_	_
5	will	will	AUX	MD	VerbForm=Fin	7	aux	_	_
6	be	be	VERB	VB	VerbForm=Inf	7	cop	_	_
7	ready	ready	ADJ	JJ	Degree=Pos	0	root	_	_
8	to	to	PART	TO	_	9	mark	_	_
9	rock	rock	VERB	VB	VerbForm=Inf	7	xcomp	_	SpaceAfter=No
10	.	.	PUNCT	.	_	7	punct	_	_


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