nsubj:cop: nominal copular subject
The dependency type nsubj:cop is used for the nominal subject
of a copular clause. The predicative is the head of the copular
clause, and also the governor of the nsubj:cop dependency.
Matto on jo kuiva . \n The_mat is already dry .
nsubj:cop(kuiva-4, Matto-1)
cop(kuiva-4, on-2)
advmod(kuiva-4, jo-3)
punct(kuiva-4, .-5)