How can we understand the distortion of spacetime by the presence of some (significant) amount of mass?
1	How	how	ADV	WRB	PronType=Int	4	advmod	4:advmod	Discourse=topic-solutionhood:90->112:4
2	can	can	AUX	MD	VerbForm=Fin	4	aux	4:aux	_
3	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	4	nsubj	4:nsubj	Entity=(53-person-giv:inact-cf2-1-ana)
4	understand	understand	VERB	VB	VerbForm=Inf	0	root	0:root	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	6:det	Entity=(129-abstract-new-cf4-2-sgl
6	distortion	distortion	NOUN	NN	Number=Sing	4	obj	4:obj	_
7	of	of	ADP	IN	_	8	case	8:case	_
8	spacetime	spacetime	NOUN	NN	Number=Sing	6	nmod	6:nmod:of	Entity=(1-abstract-giv:act-cf1*-1-coref)
9	by	by	ADP	IN	_	11	case	11:case	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	11:det	Entity=(130-abstract-new-cf5-2-sgl
11	presence	presence	NOUN	NN	Number=Sing	6	nmod	6:nmod:by	_
12	of	of	ADP	IN	_	17	case	17:case	_
13	some	some	DET	DT	PronType=Ind	17	det	17:det	Entity=(131-abstract-new-cf6-5-sgl
14	(	(	PUNCT	-LRB-	_	15	punct	15:punct	Discourse=elaboration-additional:91->90:0|SpaceAfter=No
15	significant	significant	ADJ	JJ	Degree=Pos	17	amod	17:amod	SpaceAfter=No
16	)	)	PUNCT	-RRB-	_	15	punct	15:punct	_
17	amount	amount	NOUN	NN	Number=Sing	11	nmod	11:nmod:of	Discourse=same-unit_m:92->90:1
18	of	of	ADP	IN	_	19	case	19:case	_
19	mass	mass	NOUN	NN	Number=Sing	17	nmod	17:nmod:of	Entity=(52-abstract-giv:inact-cf3-1-coref)131)130)129)|SpaceAfter=No
20	?	?	PUNCT	.	_	4	punct	4:punct	_
