But there is a puzzle:
1	But	but	CCONJ	CC	_	3	cc	_	_
2	there	there	PRON	_	_	3	expl	_	_
3	is	be	VERB	V	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	a	a	DET	RI	Definite=Ind|Number=Sing|PronType=Art	5	det	_	_
5	puzzle	puzzle	NOUN	S	Number=Sing	3	nsubj	_	SpaceAfter=No
6	:	:	PUNCT	FC	_	3	punct	_	_
