600-700 - Number of guardsmen who were in Bush's unit during that period.
1	600	600	NUM	CD	NumForm=Digit|NumType=Card	0	root	0:root	SpaceAfter=No
2	-	-	SYM	IN	_	3	case	3:case	SpaceAfter=No
3	700	700	NUM	CD	NumForm=Digit|NumType=Card	1	nmod	1:nmod	_
4	-	-	PUNCT	:	_	1	punct	1:punct	_
5	Number	number	NOUN	NN	Number=Sing	1	appos	1:appos	_
6	of	of	ADP	IN	_	7	case	7:case	_
7	guardsmen	guardsman	NOUN	NNS	Number=Plur	5	nmod	5:nmod:of|13:nsubj	_
8	who	who	PRON	WP	PronType=Rel	13	nsubj	7:ref	_
9	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	13	cop	13:cop	_
10	in	in	ADP	IN	_	13	case	13:case	_
11-12	Bush's	_	_	_	_	_	_	_	_
11	Bush	Bush	PROPN	NNP	Number=Sing	13	nmod:poss	13:nmod:poss	_
12	's	's	PART	POS	_	11	case	11:case	_
13	unit	unit	NOUN	NN	Number=Sing	7	acl:relcl	7:acl:relcl	_
14	during	during	ADP	IN	_	16	case	16:case	_
15	that	that	DET	DT	Number=Sing|PronType=Dem	16	det	16:det	_
16	period	period	NOUN	NN	Number=Sing	13	obl	13:obl:during	SpaceAfter=No
17	.	.	PUNCT	.	_	1	punct	1:punct	_
