Perhaps it was the seriousness of our business that pushed us both into laughter, extremes of emotion so easily tumbling into their opposites.
1	Perhaps	perhaps	ADV	_	_	3	advmod	_	_
2	it	it	PRON	PERS-SG	_	3	expl	_	_
3	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	0	root	_	_
4	the	the	DET	DEF	Definite=Def|PronType=Art	5	det	_	_
5	seriousness	seriousness	NOUN	SG-NOM	Number=Sing	3	nsubj	_	_
6	of	of	ADP	_	_	8	case	_	_
7	our	we	PRON	PL-GEN	Number=Plur|Person=1|Poss=Yes|PronType=Prs	8	nmod:poss	_	_
8	business	business	NOUN	SG-NOM	Number=Sing	5	nmod	_	_
9	that	that	PRON	REL	PronType=Rel	10	nsubj	_	_
10	pushed	push	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	5	acl	_	_
11	us	we	PRON	PERS-P1PL-ACC	Case=Acc|Number=Plur|Person=1|PronType=Prs	10	obj	_	_
12	both	both	PRON	TOT-PL	Number=Plur|PronType=Tot	11	nmod	_	_
13	into	into	ADP	_	_	14	case	_	_
14	laughter	laughter	NOUN	SG-NOM	Number=Sing	10	obl	_	SpaceAfter=No
15	,	,	PUNCT	Comma	_	21	punct	_	_
16	extremes	extreme	NOUN	PL-NOM	Number=Plur	21	nsubj	_	_
17	of	of	ADP	_	_	18	case	_	_
18	emotion	emotion	NOUN	SG-NOM	Number=Sing	16	nmod	_	_
19	so	so	ADV	_	_	20	advmod	_	_
20	easily	easy	ADV	_	_	21	advmod	_	_
21	tumbling	tumble	VERB	ING	Tense=Pres|VerbForm=Part	3	parataxis	_	_
22	into	into	ADP	_	_	24	case	_	_
23	their	they	PRON	P3PL-GEN	_	24	nmod:poss	_	_
24	opposites	opposite	NOUN	PL-NOM	Number=Plur	21	obl	_	SpaceAfter=No
25	.	.	PUNCT	Period	_	3	punct	_	_
