Update Conll-U to fully support and cover EWT dataset

test_data/io/test_conll/conll_09_test1.conllu

@@ -0,0 +1,85 @@
+# text = No , it was n't Black Monday .
+1	No	no	DT	DT	_	4	DEP	_	_
+2	,	,	,	,	_	4	P	_	_
+3	it	it	PRP	PRP	_	4	SBJ	_	_
+4	was	be	VBD	VBD	_	0	ROOT	_	_
+5	n't	not	RB	RB	_	4	ADV	_	_
+6	Black	black	NNP	NNP	_	7	NAME	_	_
+7	Monday	monday	NNP	NNP	_	4	PRD	_	_
+8	.	.	.	.	_	4	P	_	_
+
+# text = But while the New York Stock Exchange did n't fall apart Friday as the Dow Jones Industrial Average plunged 190.58 points -- most of it in the final hour -- it barely managed to stay this side of chaos .
+1	But	but	CC	CC	_	33	DEP	_	_	_	_	_	_	_
+2	while	while	IN	IN	_	33	ADV	_	_	_	_	AM-ADV	_	_
+3	the	the	DT	DT	_	7	NMOD	_	_	_	_	_	_	_
+4	New	new	NNP	NNP	_	5	NAME	_	_	_	_	_	_	_
+5	York	york	NNP	NNP	_	7	NAME	_	_	_	_	_	_	_
+6	Stock	stock	NNP	NNP	_	7	NAME	_	_	_	_	_	_	_
+7	Exchange	exchange	NNP	NNP	_	8	SBJ	_	_	A1	_	_	_	_
+8	did	do	VBD	VBD	_	2	SUB	_	_	_	_	_	_	_
+9	n't	not	RB	RB	_	8	ADV	_	_	AM-NEG	_	_	_	_
+10	fall	fall	VB	VB	_	8	VC	Y	fall.01	_	_	_	_	_
+11	apart	apart	RB	RB	_	10	ADV	_	_	A4	_	_	_	_
+12	Friday	friday	NNP	NNP	_	10	TMP	_	_	AM-TMP	_	_	_	_
+13	as	as	IN	IN	_	10	TMP	_	_	AM-TMP	_	_	_	_
+14	the	the	DT	DT	_	18	NMOD	_	_	_	_	_	_	_
+15	Dow	dow	NNP	NNP	_	16	NAME	_	_	_	_	_	_	_
+16	Jones	jones	NNP	NNP	_	18	NAME	_	_	_	_	_	_	_
+17	Industrial	industrial	NNP	NNP	_	18	NAME	_	_	_	_	_	_	_
+18	Average	average	NNP	NNP	_	19	SBJ	_	_	_	A1	_	_	_
+19	plunged	plunge	VBD	VBD	_	13	SUB	Y	plunge.01	_	_	_	_	_
+20	190.58	190.58	CD	CD	_	21	NMOD	_	_	_	_	_	_	_
+21	points	point	NNS	NNS	_	19	EXT	_	_	_	A2	_	_	_
+22	--	--	:	:	_	23	P	_	_	_	_	_	_	_
+23	most	most	DT	DT	_	21	NMOD	_	_	_	_	_	_	_
+24	of	of	IN	IN	_	23	NMOD	_	_	_	_	_	_	_
+25	it	it	PRP	PRP	_	24	PMOD	_	_	_	_	_	_	_
+26	in	in	IN	IN	_	23	TMP	_	_	_	_	_	_	_
+27	the	the	DT	DT	_	29	NMOD	_	_	_	_	_	_	_
+28	final	final	JJ	JJ	_	29	NMOD	_	_	_	_	_	_	_
+29	hour	hour	NN	NN	_	26	PMOD	_	_	_	_	_	_	_
+30	--	--	:	:	_	23	P	_	_	_	_	_	_	_
+31	it	it	PRP	PRP	_	33	SBJ	_	_	_	_	A0	A1	_
+32	barely	barely	RB	RB	_	33	ADV	_	_	_	_	AM-ADV	_	_
+33	managed	manage	VBD	VBD	_	0	ROOT	Y	manage.02	_	_	_	_	_
+34	to	to	TO	TO	_	33	OPRD	_	_	_	_	A1	_	_
+35	stay	stay	VB	VB	_	34	IM	Y	stay.01	_	_	_	_	_
+36	this	this	DT	DT	_	37	NMOD	_	_	_	_	_	_	_
+37	side	side	NN	NN	_	35	LOC-PRD	Y	side.01	_	_	_	A3	_
+38	of	of	IN	IN	_	37	NMOD	_	_	_	_	_	_	A1
+39	chaos	chaos	NN	NN	_	38	PMOD	_	_	_	_	_	_	_
+40	.	.	.	.	_	33	P	_	_	_	_	_	_	_
+
+# text = Some `` circuit breakers '' installed after the October 1987 crash failed their first test , traders say , unable to cool the selling panic in both stocks and futures .
+1	Some	some	DT	DT	_	4	NMOD	_	_	_	_	_	_	_	_	_	_	_
+2	``	``	``	``	_	4	P	_	_	_	_	_	_	_	_	_	_	_
+3	circuit	circuit	NN	NN	_	4	NMOD	_	_	A1	_	_	_	_	_	_	_	_
+4	breakers	breakers	NNS	NNS	_	12	SBJ	Y	breaker.01	A0	A1	_	A1	_	_	A0	_	_
+5	''	''	''	''	_	4	P	_	_	_	_	_	_	_	_	_	_	_
+6	installed	instal	VBN	VBN	_	4	APPO	Y	install.01	_	_	_	_	_	_	_	_	_
+7	after	after	IN	IN	_	6	TMP	_	_	_	AM-TMP	_	_	_	_	_	_	_
+8	the	the	DT	DT	_	11	NMOD	_	_	_	_	_	_	_	_	_	_	_
+9	October	october	NNP	NNP	_	10	NMOD	_	_	_	_	_	_	_	_	_	_	_
+10	1987	1987	CD	CD	_	11	NMOD	_	_	_	_	AM-TMP	_	_	_	_	_	_
+11	crash	crash	NN	NN	_	7	PMOD	Y	crash.01	_	_	_	_	_	_	_	_	_
+12	failed	fail	VBD	VBD	_	18	OBJ	Y	fail.01	_	_	_	_	_	A1	_	_	_
+13	their	their	PRP$	PRP$	_	15	NMOD	_	_	_	_	_	_	A0	_	_	_	_
+14	first	first	JJ	JJ	_	15	NMOD	_	_	_	_	_	_	_	_	_	_	_
+15	test	test	NN	NN	_	12	OBJ	Y	test.01	_	_	_	A2	_	_	_	_	_
+16	,	,	,	,	_	18	P	_	_	_	_	_	_	_	_	_	_	_
+17	traders	trader	NNS	NNS	_	18	SBJ	_	_	_	_	_	_	_	A0	_	_	_
+18	say	say	VBP	VBP	_	0	ROOT	Y	say.01	_	_	_	_	_	_	_	_	_
+19	,	,	,	,	_	18	P	_	_	_	_	_	_	_	_	_	_	_
+20	unable	unable	JJ	JJ	_	12	ADV	_	_	_	_	_	AM-PRD	_	_	_	_	_
+21	to	to	TO	TO	_	20	AMOD	_	_	_	_	_	_	_	_	_	_	_
+22	cool	cool	VB	VB	_	21	IM	Y	cool.01	_	_	_	_	_	_	_	_	_
+23	the	the	DT	DT	_	25	NMOD	_	_	_	_	_	_	_	_	_	_	_
+24	selling	selling	NN	NN	_	25	NMOD	Y	selling.01	_	_	_	_	_	_	_	_	A0
+25	panic	panic	NN	NN	_	22	OBJ	Y	panic.01	_	_	_	_	_	_	A1	_	_
+26	in	in	IN	IN	_	25	LOC	_	_	_	_	_	_	_	_	_	A1	AM-LOC
+27	both	both	DT	DT	_	28	NMOD	_	_	_	_	_	_	_	_	_	_	_
+28	stocks	stocks	NNS	NNS	_	26	PMOD	_	_	_	_	_	_	_	_	_	_	_
+29	and	and	CC	CC	_	28	COORD	_	_	_	_	_	_	_	_	_	_	_
+30	futures	future	NNS	NNS	_	29	CONJ	_	_	_	_	_	_	_	_	_	_	_
+31	.	.	.	.	_	12	P	_	_	_	_	_	_	_	_	_	_	_
+