Maybe this is not surprising considering that a recent study analyzing the relationship between posture and femur cross-sectional properties failed to find differences between birds and non-avian theropods [24], suggesting that simple morphological correlates of limb posture should be used with caution.
1	Maybe	maybe	ADV	RB	_	5	advmod	5:advmod	Discourse=evaluation-comment:55->54:1
2	this	this	PRON	DT	Number=Sing|PronType=Dem	5	nsubj	5:nsubj	Entity=(105-abstract-giv:act-cf1*-1-ana)
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	cop	5:cop	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	5:advmod	_
5	surprising	surprising	ADJ	JJ	Degree=Pos	0	root	0:root	_
6	considering	consider	VERB	VBG	VerbForm=Ger	5	advcl	5:advcl	Discourse=explanation-justify:56->55:0
7	that	that	SCONJ	IN	_	20	mark	20:mark	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	10:det	Entity=(106-abstract-new-cf9-3-sgl
9	recent	recent	ADJ	JJ	Degree=Pos	10	amod	10:amod	_
10	study	study	NOUN	NN	Number=Sing	20	nsubj	20:nsubj|22:nsubj:xsubj	_
11	analyzing	analyze	VERB	VBG	VerbForm=Ger	10	acl	10:acl	Discourse=elaboration-attribute:57->56:0
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	13:det	Entity=(107-abstract-new-cf11-2-sgl
13	relationship	relationship	NOUN	NN	Number=Sing	11	obj	11:obj	_
14	between	between	ADP	IN	_	15	case	15:case	_
15	posture	posture	NOUN	NN	Number=Sing	13	nmod	13:nmod:between	Entity=(108-abstract-new-cf2-1-coref)
16	and	and	CCONJ	CC	_	19	cc	19:cc	_
17	femur	femur	NOUN	NN	Number=Sing	19	compound	19:compound	Entity=(109-abstract-new-cf12-3-sgl(92-object-giv:inact-cf7-1-coref)
18	cross-sectional	cross-sectional	ADJ	JJ	Degree=Pos	19	amod	19:amod	_
19	properties	property	NOUN	NNS	Number=Plur	15	conj	13:nmod:between|15:conj:and	Entity=109)107)106)
20	failed	fail	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	6	ccomp	6:ccomp	Discourse=same-unit_m:58->56:1
21	to	to	PART	TO	_	22	mark	22:mark	_
22	find	find	VERB	VB	VerbForm=Inf	20	xcomp	20:xcomp	_
23	differences	difference	NOUN	NNS	Number=Plur	22	obj	22:obj	Entity=(85-abstract-giv:inact-cf3-1-coref
24	between	between	ADP	IN	_	25	case	25:case	_
25	birds	bird	NOUN	NNS	Number=Plur	23	nmod	23:nmod:between	Entity=(88-animal-giv:inact-cf4-1-coref)
26	and	and	CCONJ	CC	_	28	cc	28:cc	_
27	non-avian	non-avian	ADJ	JJ	Degree=Pos|Polarity=Neg	28	amod	28:amod	Entity=(87-animal-giv:inact-cf5-2-coref
28	theropods	theropod	NOUN	NNS	Number=Plur	25	conj	23:nmod:between|25:conj:and	Entity=87)85)
29	[	[	PUNCT	-LRB-	_	30	punct	30:punct	Discourse=explanation-evidence:59->56:2|SpaceAfter=No|XML=<ref>
30	24	24	NUM	CD	NumForm=Digit|NumType=Card	20	dep	20:dep	Entity=(110-abstract-new-cf13-1-sgl)|SpaceAfter=No
31	]	]	PUNCT	-RRB-	_	30	punct	30:punct	SpaceAfter=No|XML=</ref>
32	,	,	PUNCT	,	_	33	punct	33:punct	_
33	suggesting	suggest	VERB	VBG	VerbForm=Ger	20	advcl	20:advcl	Discourse=attribution-positive:60->61:0
34	that	that	SCONJ	IN	_	43	mark	43:mark	Discourse=elaboration-additional:61->56:3
35	simple	simple	ADJ	JJ	Degree=Pos	37	amod	37:amod	Entity=(111-abstract-new-cf10-3-sgl
36	morphological	morphological	ADJ	JJ	Degree=Pos	37	amod	37:amod	_
37	correlates	correlate	NOUN	NNS	Number=Plur	43	nsubj:pass	43:nsubj:pass	_
38	of	of	ADP	IN	_	40	case	40:case	_
39	limb	limb	NOUN	NN	Number=Sing	40	compound	40:compound	Entity=(108-abstract-giv:act-cf2-2-coref(45-object-giv:inact-cf8-1-coref)
40	posture	posture	NOUN	NN	Number=Sing	37	nmod	37:nmod:of	Entity=108)111)
41	should	should	AUX	MD	VerbForm=Fin	43	aux	43:aux	_
42	be	be	AUX	VB	VerbForm=Inf	43	aux:pass	43:aux:pass	_
43	used	use	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	33	ccomp	33:ccomp	_
44	with	with	ADP	IN	_	45	case	45:case	_
45	caution	caution	NOUN	NN	Number=Sing	43	obl	43:obl:with	Entity=(55-abstract-giv:inact-cf6-1-coref)|SpaceAfter=No
46	.	.	PUNCT	.	_	5	punct	5:punct	_
