The tracks in the demo are from submicron carbonyl iron particles that were shot into aerogel using a particle accelerator modified to accelerate dust particles to very high speeds, to simulate the interstellar dust impacts that we're looking for.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	Discourse=elaboration-additional:138->137:1|Entity=(138-abstract-new-cf5-2-sgl
2	tracks	track	NOUN	NNS	Number=Plur	11	nsubj	11:nsubj	_
3	in	in	ADP	IN	_	5	case	5:case	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	5:det	Entity=(136-abstract-giv:act-cf2-2-coref
5	demo	demo	NOUN	NN	Number=Sing	2	nmod	2:nmod:in	Entity=136)138)
6	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	11	cop	11:cop	_
7	from	from	ADP	IN	_	11	case	11:case	_
8	submicron	submicron	NOUN	NN	Number=Sing	11	compound	11:compound	Entity=(139-object-new-cf8-4-sgl
9	carbonyl	carbonyl	NOUN	NN	Number=Sing	10	compound	10:compound	Entity=(140-substance-new-cf11-2-sgl
10	iron	iron	NOUN	NN	Number=Sing	11	compound	11:compound	Entity=140)
11	particles	particle	NOUN	NNS	Number=Plur	0	root	0:root|14:nsubj:pass	_
12	that	that	PRON	WDT	PronType=Rel	14	nsubj:pass	11:ref	Discourse=elaboration-attribute:139->138:0
13	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	14	aux:pass	14:aux:pass	_
14	shot	shoot	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	acl:relcl	11:acl:relcl	_
15	into	into	ADP	IN	_	16	case	16:case	_
16	aerogel	aerogel	NOUN	NN	Number=Sing	14	obl	14:obl:into	Entity=(141-substance-new-cf9-1-sgl)
17	using	use	VERB	VBG	VerbForm=Ger	14	xcomp	14:xcomp	Discourse=mode-means:140->139:0
18	a	a	DET	DT	Definite=Ind|PronType=Art	20	det	20:det	Entity=(142-object-new-cf6-3-sgl
19	particle	particle	NOUN	NN	Number=Sing	20	compound	20:compound	_
20	accelerator	accelerator	NOUN	NN	Number=Sing	17	obj	17:obj	_
21	modified	modify	VERB	VBN	Tense=Past|VerbForm=Part	20	acl	20:acl	Discourse=elaboration-attribute:141->140:0
22	to	to	PART	TO	_	23	mark	23:mark	Discourse=purpose-goal:142->141:0
23	accelerate	accelerate	VERB	VB	VerbForm=Inf	21	advcl	21:advcl:to	_
24	dust	dust	NOUN	NN	Number=Sing	25	compound	25:compound	Entity=(143-object-new-cf7-2-sgl(144-substance-new-cf12-1-sgl)
25	particles	particle	NOUN	NNS	Number=Plur	23	obj	23:obj	Entity=143)
26	to	to	ADP	IN	_	29	case	29:case	_
27	very	very	ADV	RB	_	28	advmod	28:advmod	Entity=(145-abstract-new-cf10-3-sgl
28	high	high	ADJ	JJ	Degree=Pos	29	amod	29:amod	_
29	speeds	speed	NOUN	NNS	Number=Plur	23	obl	23:obl:to	Entity=145)142)|SpaceAfter=No
30	,	,	PUNCT	,	_	32	punct	32:punct	_
31	to	to	PART	TO	_	32	mark	32:mark	Discourse=purpose-goal:143->141:1
32	simulate	simulate	VERB	VB	VerbForm=Inf	14	advcl	14:advcl:to	_
33	the	the	DET	DT	Definite=Def|PronType=Art	36	det	36:det	Entity=(100-abstract-giv:inact-cf3-4-coref
34	interstellar	interstellar	ADJ	JJ	Degree=Pos	36	amod	36:amod	Entity=(63-substance-giv:inact-cf4-2-coref
35	dust	dust	NOUN	NN	Number=Sing	36	compound	36:compound	Entity=63)
36	impacts	impact	NOUN	NNS	Number=Plur	32	obj	32:obj|40:obl:for	_
37	that	that	PRON	WDT	PronType=Rel	40	obl	36:ref	Discourse=elaboration-attribute:144->143:0
38	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	40	nsubj	40:nsubj	Entity=(51-person-giv:act-cf1*-1-ana)|SpaceAfter=No
39	're	be	AUX	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	40	aux	40:aux	_
40	looking	look	VERB	VBG	Tense=Pres|VerbForm=Part	36	acl:relcl	36:acl:relcl	_
41	for	for	ADP	IN	_	37	case	37:case	Entity=100)139)|SpaceAfter=No
42	.	.	PUNCT	.	_	11	punct	11:punct	_
