The best thing you can do in Okinawa is to go to a beach.
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
2	best	good	ADJ	JJS	Degree=Sup	3	amod	3:amod	_
3	thing	thing	NOUN	NN	Number=Sing	11	nsubj:outer	11:nsubj:outer	_
4	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	6	nsubj	6:nsubj	_
5	can	can	AUX	MD	VerbForm=Fin	6	aux	6:aux	_
6	do	do	VERB	VB	VerbForm=Inf	3	acl:relcl	3:acl:relcl	_
7	in	in	ADP	IN	_	8	case	8:case	_
8	Okinawa	Okinawa	PROPN	NNP	Number=Sing	6	obl	6:obl:in	_
9	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	11:cop	_
10	to	to	PART	TO	_	11	mark	11:mark	_
11	go	go	VERB	VB	VerbForm=Inf	0	root	0:root	_
12	to	to	ADP	IN	_	14	case	14:case	_
13	a	a	DET	DT	Definite=Ind|PronType=Art	14	det	14:det	_
14	beach	beach	NOUN	NN	Number=Sing	11	obl	11:obl:to	SpaceAfter=No
15	.	.	PUNCT	.	_	11	punct	11:punct	_
