The last thing you want is other substances interacting with the reactions you're depending on to make the substances glow.
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	Discourse=adversative-antithesis:69->68:0|Entity=(88-event-new-cf2-3-coref
2	last	last	ADJ	JJ	Degree=Pos	3	amod	3:amod	_
3	thing	thing	NOUN	NN	Number=Sing	8	nsubj	8:nsubj	_
4	you	you	PRON	PRP	Case=Nom|Number=Sing|Person=2|PronType=Prs	5	nsubj	5:nsubj	Entity=(11-person-giv:act-cf1*-1-ana)
5	want	want	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	3	acl:relcl	3:acl:relcl	Entity=88)
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	cop	8:cop	_
7	other	other	ADJ	JJ	Degree=Pos	8	amod	8:amod	Entity=(88-event-giv:act-cf2-2-pred(89-substance-new-cf5-2-sgl
8	substances	substance	NOUN	NNS	Number=Plur	0	root	0:root	Entity=89)
9	interacting	interact	VERB	VBG	VerbForm=Ger	8	acl	8:acl	_
10	with	with	ADP	IN	_	12	case	12:case	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	12:det	Entity=(90-event-new-cf4-2-sgl
12	reactions	reaction	NOUN	NNS	Number=Plur	9	obl	9:obl:with	_
13	you	you	PRON	PRP	Case=Nom|Number=Sing|Person=2|PronType=Prs	15	nsubj	15:nsubj|18:nsubj:xsubj|21:nsubj:xsubj	Discourse=elaboration-attribute:70->69:0|Entity=(11-person-giv:act-cf1*-1-ana)|SpaceAfter=No
14	're	be	AUX	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	15	aux	15:aux	_
15	depending	depend	VERB	VBG	Tense=Pres|VerbForm=Part	12	acl:relcl	12:acl:relcl	_
16	on	on	ADP	IN	_	15	obl	15:obl	_
17	to	to	PART	TO	_	18	mark	18:mark	Discourse=purpose-goal:71->70:0
18	make	make	VERB	VB	VerbForm=Inf	15	xcomp	15:xcomp	_
19	the	the	DET	DT	Definite=Def|PronType=Art	20	det	20:det	Entity=(57-substance-giv:inact-cf3-2-coref
20	substances	substance	NOUN	NNS	Number=Plur	18	obj	18:obj|21:nsubj:xsubj	Entity=57)
21	glow	glow	VERB	VB	VerbForm=Inf	18	xcomp	18:xcomp	Entity=90)88)|SpaceAfter=No
22	.	.	PUNCT	.	_	8	punct	8:punct	_
