The Dursleys hadn't even remembered that today happened to be Harry's twelfth birthday.
1	The	the	DET	DEF	Definite=Def|PronType=Art	2	det	_	_
2	Dursleys	Dursley	PROPN	PL-NOM	Number=Plur	6	nsubj	_	_
3	had	have	AUX	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	6	aux	_	SpaceAfter=No
4	n't	not	PART	NEG	_	6	advmod	_	_
5	even	even	ADV	_	_	6	advmod	_	_
6	remembered	remember	VERB	PERF	Mood=Ind|Tense=Past|VerbForm=Fin	0	root	_	_
7	that	that	SCONJ	_	_	9	mark	_	_
8	today	today	NOUN	SG-NOM	Number=Sing	9	nsubj	_	_
9	happened	happen	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	6	ccomp	_	_
10	to	to	PART	_	_	15	mark	_	_
11	be	be	AUX	INF	VerbForm=Inf	15	cop	_	_
12	Harry	Harry	PROPN	SG	Number=Sing	15	nmod:poss	_	SpaceAfter=No
13	's	's	PART	GEN	_	12	case	_	_
14	twelfth	twelfth	ADJ	ORD	Degree=Pos	15	amod	_	_
15	birthday	birthday	NOUN	SG-NOM	Number=Sing	9	xcomp	_	SpaceAfter=No
16	.	.	PUNCT	Period	_	6	punct	_	_
