expl: expletive
This relation captures an existential there or it in extraposition constructions. There is further discussion and examples on the universal dependency page (u-dep/expl).
There is a ghost in the room
expl(is, There)
expl in other languages: [bg] [de] [el] [en] [fr] [fro] [gsw] [it] [no] [pt] [qpm] [ro] [ru] [sl] [sv] [u] [yue]