tools/udtools/tests/test-cases/invalid-level2/empty-node-nonempty.conllu

# sent_id = empty-node
# text = This holes
# not valid: UPOSTAG must have format '[A-Z]+' or '_' in empty nodes
1	This	this	PRON	_	_	0	root	1.1:nsubj	_
1.1	_	_	VERB	_	_	2	dep	0:root	_
2	holes	hole	NOUN	_	_	1	orphan	1.1:obj	_