The letters, six in all, were sent within two hours of each other and represented dozens of power generators.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	_
2	letters	letter	NOUN	NNS	Number=Plur	9	nsubj:pass	9:nsubj:pass|17:nsubj:pass	SpaceAfter=No
3	,	,	PUNCT	,	_	2	punct	2:punct	_
4	six	six	NUM	CD	NumForm=Word|NumType=Card	2	appos	2:appos	_
5	in	in	ADP	IN	_	6	case	6:case	_
6	all	all	DET	DT	_	4	nmod	4:nmod:in	SpaceAfter=No
7	,	,	PUNCT	,	_	9	punct	9:punct	_
8	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	9	aux:pass	9:aux:pass	_
9	sent	send	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	0:root	_
10	within	within	ADP	IN	_	12	case	12:case	_
11	two	two	NUM	CD	NumForm=Word|NumType=Card	12	nummod	12:nummod	_
12	hours	hour	NOUN	NNS	Number=Plur	9	obl	9:obl:within	_
13	of	of	ADP	IN	_	14	case	14:case	_
14	each	each	DET	DT	ExtPos=PRON|PronType=Rcp	12	nmod	12:nmod:of	_
15	other	other	ADJ	JJ	Degree=Pos	14	fixed	14:fixed	_
16	and	and	CCONJ	CC	_	17	cc	17:cc	_
17	represented	represent	VERB	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	9	conj	9:conj:and	_
18	dozens	dozen	NOUN	NNS	Number=Plur	17	obj	17:obj	_
19	of	of	ADP	IN	_	21	case	21:case	_
20	power	power	NOUN	NN	Number=Sing	21	compound	21:compound	_
21	generators	generator	NOUN	NNS	Number=Plur	18	nmod	18:nmod:of	SpaceAfter=No
22	.	.	PUNCT	.	_	9	punct	9:punct	_
