Birds have relatively shorter, stouter femora than non-avian theropods, presumed to be associated with more horizontal orientation.
1	Birds	bird	NOUN	NNS	Number=Plur	2	nsubj	2:nsubj	Discourse=elaboration-additional:42->40:1|Entity=(88-animal-giv:act-cf1*-1-coref)
2	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
3	relatively	relatively	ADV	RB	Degree=Pos	4	advmod	4:advmod	_
4	shorter	short	ADJ	JJR	Degree=Cmp	7	amod	7:amod	Entity=(92-object-new-cf3-4-coref|SpaceAfter=No
5	,	,	PUNCT	,	_	4	punct	4:punct	_
6	stouter	stout	ADJ	JJR	Degree=Cmp	7	amod	7:amod	_
7	femora	femora	NOUN	NNS	Number=Plur	2	obj	2:obj	Entity=92)
8	than	than	ADP	IN	_	10	case	10:case	_
9	non-avian	non-avian	ADJ	JJ	Degree=Pos|Polarity=Neg	10	amod	10:amod	Entity=(87-animal-giv:act-cf2-2-coref
10	theropods	theropod	NOUN	NNS	Number=Plur	7	nmod	7:nmod:than	Entity=87)|SpaceAfter=No
11	,	,	PUNCT	,	_	12	punct	12:punct	_
12	presumed	presume	VERB	VBN	Tense=Past|VerbForm=Part	7	acl	7:acl	Discourse=elaboration-attribute:43->42:0
13	to	to	PART	TO	_	15	mark	15:mark	_
14	be	be	AUX	VB	VerbForm=Inf	15	aux:pass	15:aux:pass	_
15	associated	associate	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	12	xcomp	12:xcomp	_
16	with	with	ADP	IN	_	19	case	19:case	_
17	more	more	ADV	RBR	Degree=Cmp	18	advmod	18:advmod	Entity=(93-abstract-new-cf4-3-sgl
18	horizontal	horizontal	ADJ	JJ	Degree=Pos	19	amod	19:amod	_
19	orientation	orientation	NOUN	NN	Number=Sing	15	obl	15:obl:with	Entity=93)|SpaceAfter=No
20	.	.	PUNCT	.	_	2	punct	2:punct	_
