The crop dusters were to be part of a "second wave."
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
2	crop	crop	NOUN	NN	Number=Sing	3	compound	3:compound	_
3	dusters	duster	NOUN	NNS	Number=Plur	7	nsubj	7:nsubj	_
4	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	7	aux	7:aux	_
5	to	to	PART	TO	_	7	mark	7:mark	_
6	be	be	AUX	VB	VerbForm=Inf	7	cop	7:cop	_
7	part	part	NOUN	NN	Number=Sing	0	root	0:root	_
8	of	of	ADP	IN	_	12	case	12:case	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	12:det	_
10	"	"	PUNCT	``	_	12	punct	12:punct	SpaceAfter=No
11	second	second	ADJ	JJ	Degree=Pos|NumType=Ord	12	amod	12:amod	_
12	wave	wave	NOUN	NN	Number=Sing	7	nmod	7:nmod:of	SpaceAfter=No
13	.	.	PUNCT	.	_	7	punct	7:punct	SpaceAfter=No
14	"	"	PUNCT	''	_	7	punct	7:punct	_
