One of her boys probably stepped on a landmine.
1	One	one	NUM	CD	NumForm=Word|NumType=Card	6	nsubj	6:nsubj	Discourse=causal-cause:67->63:1|Entity=(104-person-acc:com-cf3-1-sgl
2	of	of	ADP	IN	_	4	case	4:case	_
3	her	her	PRON	PRP$	Case=Gen|Gender=Fem|Number=Sing|Person=3|Poss=Yes|PronType=Prs	4	nmod:poss	4:nmod:poss	Entity=(54-person-giv:inact-cf2-2-coref(2-person-giv:act-cf1*-1-ana-Mrs._Claus)
4	boys	boy	NOUN	NNS	Number=Plur	1	nmod	1:nmod:of	Entity=54)104)
5	probably	probably	ADV	RB	Degree=Pos	6	advmod	6:advmod	_
6	stepped	step	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	0	root	0:root	_
7	on	on	ADP	IN	_	9	case	9:case	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	9:det	Entity=(105-object-new-cf4-2-sgl
9	landmine	landmine	NOUN	NN	Number=Sing	6	obl	6:obl:on	Entity=105)|SpaceAfter=No
10	.	.	PUNCT	.	_	6	punct	6:punct	_
