The cause of this celebration is the 10th anniversary of the Nat Gas futures contract.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	_
2	cause	cause	NOUN	NN	Number=Sing	9	nsubj	9:nsubj	_
3	of	of	ADP	IN	_	5	case	5:case	_
4	this	this	DET	DT	Number=Sing|PronType=Dem	5	det	5:det	_
5	celebration	celebration	NOUN	NN	Number=Sing	2	nmod	2:nmod:of	_
6	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	9:cop	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	_
8	10th	10th	ADJ	JJ	Degree=Pos|NumType=Ord	9	amod	9:amod	_
9	anniversary	anniversary	NOUN	NN	Number=Sing	0	root	0:root	_
10	of	of	ADP	IN	_	15	case	15:case	_
11	the	the	DET	DT	Definite=Def|PronType=Art	15	det	15:det	_
12	Nat	nat	ADJ	JJ	Degree=Pos	13	amod	13:amod	_
13	Gas	gas	NOUN	NN	Number=Sing	14	compound	14:compound	_
14	futures	future	NOUN	NNS	Number=Plur	15	compound	15:compound	_
15	contract	contract	NOUN	NN	Number=Sing	9	nmod	9:nmod:of	SpaceAfter=No
16	.	.	PUNCT	.	_	9	punct	9:punct	_
