That's why I'm posting here!
1-2	That's	_	_	_	_	_	_	_	_
1	That	that	PRON	DT	Number=Sing|PronType=Dem	3	nsubj	3:nsubj	_
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	3:cop	_
3	why	why	ADV	WRB	PronType=Rel	0	root	0:root	_
4-5	I'm	_	_	_	_	_	_	_	_
4	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	6	nsubj	6:nsubj	_
5	'm	be	AUX	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	6	aux	6:aux	_
6	posting	post	VERB	VBG	VerbForm=Ger	3	advcl:relcl	3:advcl:relcl	_
7	here	here	ADV	RB	PronType=Dem	6	advmod	6:advmod	SpaceAfter=No
8	!	!	PUNCT	.	_	3	punct	3:punct	_
