The idea, his idea, was a three-day cruise to chase the comet Kohoutek, named after the Czech astronomer who had discovered it.
1	The	the	DET	DEF	Definite=Def|PronType=Art	2	det	_	_
2	idea	idea	NOUN	SG-NOM	Number=Sing	10	nsubj	_	SpaceAfter=No
3	,	,	PUNCT	Comma	_	5	punct	_	_
4	his	he	PRON	P3SG-GEN	Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	idea	idea	NOUN	SG-NOM	Number=Sing	2	appos	_	SpaceAfter=No
6	,	,	PUNCT	Comma	_	5	punct	_	_
7	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	10	cop	_	_
8	a	a	DET	IND-SG	Definite=Ind|PronType=Art	10	det	_	_
9	three-day	three-day	ADJ	POS	Degree=Pos	10	amod	_	_
10	cruise	cruise	NOUN	SG-NOM	Number=Sing	0	root	_	_
11	to	to	PART	_	_	12	mark	_	_
12	chase	chase	VERB	INF	VerbForm=Inf	10	acl	_	_
13	the	the	DET	DEF	Definite=Def|PronType=Art	14	det	_	_
14	comet	comet	NOUN	SG-NOM	Number=Sing	12	obj	_	_
15	Kohoutek	Kohoutek	PROPN	SG-NOM	Number=Sing	14	nmod	_	SpaceAfter=No
16	,	,	PUNCT	Comma	_	17	punct	_	_
17	named	name	VERB	PASS	Tense=Past|VerbForm=Part|Voice=Pass	15	acl	_	_
18	after	after	ADP	_	_	21	case	_	_
19	the	the	DET	DEF	Definite=Def|PronType=Art	21	det	_	_
20	Czech	Czech	ADJ	POS	Degree=Pos	21	amod	_	_
21	astronomer	astronomer	NOUN	SG-NOM	Number=Sing	17	obl	_	_
22	who	who	PRON	WH-REL	PronType=Rel	24	nsubj	_	_
23	had	have	AUX	PAST-AUX	Mood=Ind|Tense=Past|VerbForm=Fin	24	aux	_	_
24	discovered	discover	VERB	PERF	Tense=Past|VerbForm=Part	21	acl:relcl	_	_
25	it	it	PRON	PERS-SG	_	24	obj	_	SpaceAfter=No
26	.	.	PUNCT	Period	_	10	punct	_	_
