I don't know if this means that they just don't expire or I don't know.
1	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	4	nsubj	4:nsubj	Discourse=attribution-negative:108->109:0|Entity=(21-person-giv:inact-cf1-1-ana)
2-3	don't	_	_	_	_	_	_	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	4	aux	4:aux	_
3	n't	not	PART	RB	Polarity=Neg	4	advmod	4:advmod	_
4	know	know	VERB	VB	VerbForm=Inf	0	root	0:root	_
5	if	if	SCONJ	IN	_	7	mark	7:mark	Discourse=attribution-positive:109->110:0
6	this	this	PRON	DT	Number=Sing|PronType=Dem	7	nsubj	7:nsubj	Entity=(60-abstract-giv:act-cf2*-1-coref)
7	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	ccomp	4:ccomp	_
8	that	that	SCONJ	IN	_	13	mark	13:mark	Discourse=evaluation-comment:110->107:0
9	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	13	nsubj	13:nsubj	Entity=(64-object-giv:act-cf3-1-ana)
10	just	just	ADV	RB	_	13	advmod	13:advmod	_
11-12	don't	_	_	_	_	_	_	_	_
11	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	13	aux	13:aux	_
12	n't	not	PART	RB	Polarity=Neg	13	advmod	13:advmod	_
13	expire	expire	VERB	VB	VerbForm=Inf	7	ccomp	7:ccomp	_
14	or	or	CCONJ	CC	_	18	cc	18:cc	Discourse=attribution-negative:111->113:0
15	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	18	nsubj	18:nsubj	Entity=(21-person-giv:act-cf1-1-ana)
16-17	don't	_	_	_	_	_	_	_	_
16	do	do	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	18	aux	18:aux	_
17	n't	not	PART	RB	Polarity=Neg	18	advmod	18:advmod	_
18	know	know	VERB	VB	VerbForm=Inf	7	conj	4:ccomp|7:conj:or	SpaceAfter=No
19	.	.	PUNCT	.	_	4	punct	4:punct	_
