Although no one knows what happened to the Olmec after about 400 BCE, in part because the jungle reclaimed many of their cities, their culture was the base upon which the Maya and the Aztec built.
1	Although	although	SCONJ	IN	_	4	mark	4:mark	Discourse=attribution-positive:89->90:0
2	no	no	DET	DT	Polarity=Neg|PronType=Art	3	det	3:det	Entity=(168-person-new-cf7-2-sgl
3	one	one	PRON	NN	Number=Sing|PronType=Neg	4	nsubj	4:nsubj	Entity=168)
4	knows	know	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	30	advcl	30:advcl:although	_
5	what	what	PRON	WP	PronType=Rel	4	obj	4:obj	Discourse=adversative-concession:90->92:1
6	happened	happen	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	5	acl:relcl	5:acl:relcl	_
7	to	to	ADP	IN	_	9	case	9:case	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	Entity=(92-person-giv:act-cf1*-2-coref-Olmecs
9	Olmec	Olmec	PROPN	NNPS	Number=Plur	6	obl	6:obl:to	Entity=92)
10	after	after	ADP	IN	_	12	case	12:case	_
11	about	about	ADV	RB	_	12	advmod	12:advmod	Entity=(147-time-giv:inact-cf4-2-coref
12	400	400	NUM	CD	NumForm=Digit|NumType=Card	6	obl	6:obl:after	XML=<date when:::"-400">
13	BCE	BCE	ADV	RB	Degree=Pos	12	advmod	12:advmod	Entity=147)|SpaceAfter=No|XML=</date>
14	,	,	PUNCT	,	_	20	punct	20:punct	_
15	in	in	ADP	IN	_	16	case	16:case	Discourse=causal-cause:91->90:1
16	part	part	NOUN	NN	Number=Sing	20	obl	20:obl:in	_
17	because	because	SCONJ	IN	_	20	mark	20:mark	_
18	the	the	DET	DT	Definite=Def|PronType=Art	19	det	19:det	Entity=(169-place-new-cf6-2-sgl
19	jungle	jungle	NOUN	NN	Number=Sing	20	nsubj	20:nsubj	Entity=169)
20	reclaimed	reclaim	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	4	advcl	4:advcl:because	_
21	many	many	ADJ	JJ	Degree=Pos	20	obj	20:obj	_
22	of	of	ADP	IN	_	24	case	24:case	_
23	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	24	nmod:poss	24:nmod:poss	Entity=(159-place-giv:inact-cf3-2-coref(92-person-giv:act-cf1*-1-ana-Olmecs)
24	cities	city	NOUN	NNS	Number=Plur	21	obl	21:obl:of	Entity=159)|SpaceAfter=No
25	,	,	PUNCT	,	_	4	punct	4:punct	_
26	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	27	nmod:poss	27:nmod:poss	Discourse=explanation-justify:92->77:1|Entity=(170-abstract-new-cf2-2-coref(92-person-giv:act-cf1*-1-ana-Olmecs)
27	culture	culture	NOUN	NN	Number=Sing	30	nsubj	30:nsubj	Entity=170)
28	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	30	cop	30:cop	_
29	the	the	DET	DT	Definite=Def|PronType=Art	30	det	30:det	Entity=(170-abstract-giv:act-cf2-2-coref
30	base	base	NOUN	NN	Number=Sing	0	root	0:root|38:obl:upon	_
31	upon	upon	ADP	IN	_	32	case	32:case	Discourse=elaboration-attribute:93->92:0
32	which	which	PRON	WDT	PronType=Rel	38	obl	30:ref	_
33	the	the	DET	DT	Definite=Def|PronType=Art	34	det	34:det	Entity=(171-person-new-cf5-2-coref-Maya_peoples
34	Maya	Maya	PROPN	NNPS	Number=Plur	38	nsubj	38:nsubj	Entity=171)
35	and	and	CCONJ	CC	_	37	cc	37:cc	_
36	the	the	DET	DT	Definite=Def|PronType=Art	37	det	37:det	Entity=(172-person-new-cf8-2-coref-Aztecs
37	Aztec	Aztec	PROPN	NNPS	Number=Plur	34	conj	34:conj:and|38:nsubj	Entity=172)
38	built	build	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	30	acl:relcl	30:acl:relcl	Entity=170)|SpaceAfter=No
39	.	.	PUNCT	.	_	30	punct	30:punct	_
