Certainly the affair was too stupid – when I think of it – to be altogether natural.
1	Certainly	certainly	ADV	_	_	6	advmod	_	_
2	the	the	DET	DEF	Definite=Def|PronType=Art	3	det	_	_
3	affair	affair	NOUN	SG-NOM	Number=Sing	6	nsubj	_	_
4	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	6	cop	_	_
5	too	too	ADV	_	_	6	advmod	_	_
6	stupid	stupid	ADJ	POS	Degree=Pos	0	root	_	_
7	–	–	PUNCT	Dash	_	10	punct	_	_
8	when	when	SCONJ	_	Case=Nom	10	mark	_	_
9	I	I	PRON	PERS-P1SG-NOM	Case=Nom|Number=Sing|Person=1|PronType=Prs	10	nsubj	_	_
10	think	think	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	6	parataxis	_	_
11	of	of	ADP	_	_	12	case	_	_
12	it	it	PRON	PERS-SG	_	10	obl	_	_
13	–	–	PUNCT	Dash	_	10	punct	_	_
14	to	to	PART	_	_	17	mark	_	_
15	be	be	AUX	INF-AUX	VerbForm=Inf	17	cop	_	_
16	altogether	altogether	ADV	_	_	17	advmod	_	_
17	natural	natural	ADJ	POS	Degree=Pos	6	acl	_	SpaceAfter=No
18	.	.	PUNCT	Period	_	6	punct	_	_
