Vietnam m16 used to clog up and never work.
1	Vietnam	Vietnam	PROPN	NNP	Number=Sing	2	compound	2:compound	_
2	m	m	NOUN	NN	Number=Sing	4	nsubj	4:nsubj|6:nsubj:xsubj|10:nsubj:xsubj	SpaceAfter=No
3	16	16	NUM	CD	NumForm=Digit|NumType=Card	2	nummod	2:nummod	_
4	used	use	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
5	to	to	PART	TO	_	6	mark	6:mark	_
6	clog	clog	VERB	VB	VerbForm=Inf	4	xcomp	4:xcomp	_
7	up	up	ADP	RP	_	6	compound:prt	6:compound:prt	_
8	and	and	CCONJ	CC	_	10	cc	10:cc	_
9	never	never	ADV	RB	_	10	advmod	10:advmod	_
10	work	work	VERB	VB	VerbForm=Inf	6	conj	4:xcomp|6:conj:and	SpaceAfter=No
11	.	.	PUNCT	.	_	4	punct	4:punct	_
