The Salt and Verde Rivers of central Arizona were exploited for large-scale agriculture by Native Americans as early as the 11th century.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	Discourse=elaboration-additional:16->15:0|Entity=(31-place-new-cf4-2,4,5,8-sgl-Salt_River_%28Arizona%29
2	Salt	Salt	PROPN	NNP	Number=Sing	5	compound	5:compound	_
3	and	and	CCONJ	CC	_	4	cc	4:cc	_
4	Verde	Verde	PROPN	NNP	Number=Sing	2	conj	2:conj:and|5:compound	_
5	Rivers	River	PROPN	NNPS	Number=Plur	10	nsubj:pass	10:nsubj:pass	_
6	of	of	ADP	IN	_	8	case	8:case	_
7	central	central	ADJ	JJ	Degree=Pos	8	amod	8:amod	Bridge=2<32|Entity=(32-place-acc:inf-cf3-2-sgl-Central_Arizona_Project
8	Arizona	Arizona	PROPN	NNP	Number=Sing	5	nmod	5:nmod:of	Entity=32)31)
9	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	10	aux:pass	10:aux:pass	_
10	exploited	exploit	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	0:root	_
11	for	for	ADP	IN	_	15	case	15:case	_
12	large	large	ADJ	JJ	Degree=Pos	14	amod	14:amod	Entity=(30-abstract-giv:act-cf1*-4-coref|SpaceAfter=No|XML=<w>
13	-	-	PUNCT	HYPH	_	12	punct	12:punct	SpaceAfter=No
14	scale	scale	NOUN	NN	Number=Sing	15	compound	15:compound	XML=</w>
15	agriculture	agriculture	NOUN	NN	Number=Sing	10	obl	10:obl:for	Entity=30)
16	by	by	ADP	IN	_	18	case	18:case	_
17	Native	Native	ADJ	NNP	Degree=Pos|Number=Sing	18	amod	18:amod	Entity=(33-person-new-cf5-1,2-coref-Native_Americans_in_the_United_States
18	Americans	American	PROPN	NNPS	Number=Plur	10	obl:agent	10:obl:agent	Entity=33)
19	as	as	ADV	RB	_	20	advmod	20:advmod	_
20	early	early	ADV	RB	Degree=Pos	10	advmod	10:advmod	_
21	as	as	ADP	IN	_	24	case	24:case	_
22	the	the	DET	DT	Definite=Def|PronType=Art	24	det	24:det	Entity=(34-time-acc:com-cf2-3-sgl|XML=<date from:::"1000-01-01" to:::"1099-01-01">
23	11th	11th	ADJ	JJ	Degree=Pos|NumType=Ord	24	amod	24:amod	_
24	century	century	NOUN	NN	Number=Sing	20	obl	20:obl:as	Entity=34)|SpaceAfter=No|XML=</date>
25	.	.	PUNCT	.	_	10	punct	10:punct	_
