Many leading health researchers, including Kelly Brownell, David Ludwig, and Walter Willett, have documented these problems.
1	Many	many	DET	DI	Number=Plur|PronType=Ind	4	det	_	_
2	leading	lead	VERB	V	Number=Sing|Tense=Pres|VerbForm=Part	3	acl	_	_
3	health	health	NOUN	S	Number=Sing	4	nmod	_	_
4	researchers	researcher	NOUN	S	Number=Plur	18	nsubj	_	SpaceAfter=No
5	,	,	PUNCT	FF	_	4	punct	_	_
6	including	include	VERB	V	Number=Sing|Tense=Pres|VerbForm=Part	4	acl	_	_
7	Kelly	Kelly	PROPN	SP	_	6	obj	_	_
8	Brownell	Brownell	PROPN	SP	_	7	flat	_	SpaceAfter=No
9	,	,	PUNCT	FF	_	10	punct	_	_
10	David	David	PROPN	SP	_	7	conj	_	_
11	Ludwig	Ludwig	PROPN	SP	_	10	flat	_	SpaceAfter=No
12	,	,	PUNCT	FF	_	14	punct	_	_
13	and	and	CCONJ	CC	_	14	cc	_	_
14	Walter	Walter	PROPN	SP	_	7	conj	_	_
15	Willett	Willett	PROPN	SP	_	14	flat	_	SpaceAfter=No
16	,	,	PUNCT	FF	_	4	punct	_	_
17	have	have	AUX	VA	Mood=Ind|Number=Plur|Tense=Pres|VerbForm=Fin	18	aux	_	_
18	documented	document	VERB	V	Tense=Past|VerbForm=Part	0	root	_	_
19	these	this	DET	DD	Number=Plur|PronType=Dem	20	det	_	_
20	problems	problem	NOUN	S	Number=Plur	18	obj	_	SpaceAfter=No
21	.	.	PUNCT	FS	_	18	punct	_	_
