This is necessary to remove the excess saponins on the outside of the grains which impart a bitter flavor to quinoa if not removed.
1	This	this	PRON	DT	Number=Sing|PronType=Dem	3	nsubj	3:nsubj	Discourse=explanation-motivation:26->25:1|Entity=(31-event-acc:com-cf3-1-coref)
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	3:cop	_
3	necessary	necessary	ADJ	JJ	Degree=Pos	0	root	0:root	_
4	to	to	PART	TO	_	5	mark	5:mark	Discourse=purpose-goal:27->26:0
5	remove	remove	VERB	VB	VerbForm=Inf	3	advcl	3:advcl:to	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	8:det	Entity=(34-substance-new-cf4-3-sgl
7	excess	excess	ADJ	JJ	Degree=Pos	8	amod	8:amod	_
8	saponins	saponin	NOUN	NNS	Number=Plur	5	obj	5:obj|16:nsubj	_
9	on	on	ADP	IN	_	11	case	11:case	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	11:det	Entity=(35-place-new-cf6-2-sgl
11	outside	outside	NOUN	NN	Number=Sing	8	nmod	8:nmod:on	_
12	of	of	ADP	IN	_	14	case	14:case	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	14:det	Entity=(19-substance-giv:act-cf1*-2-coref
14	grains	grain	NOUN	NNS	Number=Plur	11	nmod	11:nmod:of	Entity=19)35)
15	which	which	PRON	WDT	PronType=Rel	16	nsubj	8:ref	Discourse=elaboration-attribute:28->27:0
16	impart	impart	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	8	acl:relcl	8:acl:relcl	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	19	det	19:det	Entity=(36-abstract-new-cf5-3-sgl
18	bitter	bitter	ADJ	JJ	Degree=Pos	19	amod	19:amod	_
19	flavor	flavor	NOUN	NN	Number=Sing	16	obj	16:obj	Entity=36)
20	to	to	ADP	IN	_	21	case	21:case	_
21	quinoa	quinoa	NOUN	NN	Number=Sing	16	obl	16:obl:to	Entity=(11-substance-giv:inact-cf2-1-coref)
22	if	if	SCONJ	IN	_	24	mark	24:mark	Discourse=contingency-condition:29->28:0
23	not	not	PART	RB	Polarity=Neg	24	advmod	24:advmod	_
24	removed	remove	VERB	VBN	Tense=Past|VerbForm=Part	16	advcl	16:advcl:if	Entity=34)|SpaceAfter=No
25	.	.	PUNCT	.	_	3	punct	3:punct	_
