Notice that each tag set has both start and end tags and is case sensitive, and that the tag sets are properly nested within each other.
1	Notice	notice	VERB	IMP	VerbForm=Inf	0	root	_	_
2	that	that	SCONJ	_	_	6	mark	_	_
3	each	each	DET	TOT-SG	_	5	det	_	_
4	tag	tag	NOUN	SG-NOM	Number=Sing	5	compound	_	_
5	set	set	NOUN	SG-NOM	Number=Sing	6	nsubj	_	_
6	has	have	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	ccomp	_	_
7	both	both	CCONJ	_	_	8	cc	_	_
8	start	start	NOUN	SG-NOM	Number=Sing	11	compound	_	_
9	and	and	CCONJ	_	_	10	cc	_	_
10	end	end	VERB	IMP	Mood=Ind|Tense=Pres|VerbForm=Fin	8	conj	_	_
11	tags	tag	NOUN	PL-NOM	Number=Plur	6	obj	_	_
12	and	and	CCONJ	_	_	15	cc	_	_
13	is	be	AUX	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	15	cop	_	_
14	case	case	NOUN	SG-NOM	Number=Sing	15	compound	_	_
15	sensitive	sensitive	ADJ	POS	Degree=Pos	6	conj	_	SpaceAfter=No
16	,	,	PUNCT	Comma	_	24	punct	_	_
17	and	and	CCONJ	_	_	24	cc	_	_
18	that	that	SCONJ	_	_	24	mark	_	_
19	the	the	DET	DEF	Definite=Def|PronType=Art	21	det	_	_
20	tag	tag	NOUN	SG-NOM	Number=Sing	21	compound	_	_
21	sets	set	NOUN	PL-NOM	Number=Plur	24	nsubj	_	_
22	are	be	AUX	PRES-AUX	Mood=Ind|Tense=Pres|VerbForm=Fin	24	cop	_	_
23	properly	properly	ADV	_	_	24	advmod	_	_
24	nested	nested	ADJ	POS	Degree=Pos	6	conj	_	_
25	within	within	ADP	_	_	26	case	_	_
26	each	each	PRON	RCP-SG-ACC	Case=Nom	24	nmod	_	_
27	other	other	PRON	RCP-SG-ACC	Case=Nom	26	fixed	_	SpaceAfter=No
28	.	.	PUNCT	Period	_	1	punct	_	_
