It is a hub for American Airlines and Southwest Airlines.
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	4:nsubj	Discourse=joint-list_m:70->69:0|Entity=(123-place-giv:act-cf1*-1-ana-Phoenix_Sky_Harbor_International_Airport)
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	4:cop	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	4:det	Entity=(123-place-giv:act-cf1*-2-pred-Phoenix_Sky_Harbor_International_Airport
4	hub	hub	NOUN	NN	Number=Sing	0	root	0:root	_
5	for	for	ADP	IN	_	7	case	7:case	_
6	American	American	ADJ	NNP	Degree=Pos|Number=Sing	7	amod	7:amod	Entity=(128-organization-new-cf2-1,2-coref-American_Airlines|XML=<ref target:::"https://www.aa.com/">
7	Airlines	Airline	PROPN	NNPS	Number=Plur	4	nmod	4:nmod:for	Entity=128)|XML=</ref>
8	and	and	CCONJ	CC	_	10	cc	10:cc	_
9	Southwest	Southwest	PROPN	NNP	Number=Sing	10	compound	10:compound	Entity=(129-organization-new-cf3-1,2-coref-Southwest_Airlines|XML=<ref target:::"http://www.southwest.com/">
10	Airlines	Airline	PROPN	NNPS	Number=Plur	7	conj	4:nmod:for|7:conj:and	Entity=129)123)|SpaceAfter=No|XML=</ref>
11	.	.	PUNCT	.	_	4	punct	4:punct	_
