In the last decade, there has been a real and significant increase in childhood and, to a certain extent, adult carcinoma of the thyroid in contaminated regions of the former Soviet Union (Wi940) which should be attributed to the Chernobyl accident until proven otherwise.
1	In	in	ADP	IN	_	4	case	4:case	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	4:det	_
3	last	last	ADJ	JJ	Degree=Pos	4	amod	4:amod	_
4	decade	decade	NOUN	NN	Number=Sing	13	nmod	13:nmod:in	SpaceAfter=No
5	,	,	PUNCT	,	_	8	punct	8:punct	_
6	there	there	PRON	EX	_	8	expl	8:expl	_
7	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux	8:aux	_
8	been	be	VERB	VBN	Tense=Past|VerbForm=Part	0	root	0:root	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	13:det	_
10	real	real	ADJ	JJ	Degree=Pos	13	amod	13:amod	_
11	and	and	CCONJ	CC	_	12	cc	12:cc	_
12	significant	significant	ADJ	JJ	Degree=Pos	10	conj	10:conj:and|13:amod	_
13	increase	increase	NOUN	NN	Number=Sing	8	nsubj	8:nsubj|42:nsubj:pass	_
14	in	in	ADP	IN	_	24	case	24:case	_
15	childhood	childhood	NOUN	NN	Number=Sing	24	compound	24:compound	_
16	and	and	CCONJ	CC	_	23	cc	23:cc	SpaceAfter=No
17	,	,	PUNCT	,	_	23	punct	23:punct	_
18	to	to	ADP	IN	_	21	case	21:case	_
19	a	a	DET	DT	Definite=Ind|PronType=Art	21	det	21:det	_
20	certain	certain	ADJ	JJ	Degree=Pos	21	amod	21:amod	_
21	extent	extent	NOUN	NN	Number=Sing	23	nmod	23:nmod:to	SpaceAfter=No
22	,	,	PUNCT	,	_	23	punct	23:punct	_
23	adult	adult	NOUN	NN	Number=Sing	15	conj	15:conj:and|24:compound	_
24	carcinoma	carcinoma	NOUN	NN	Number=Sing	13	nmod	13:nmod:in	_
25	of	of	ADP	IN	_	27	case	27:case	_
26	the	the	DET	DT	Definite=Def|PronType=Art	27	det	27:det	_
27	thyroid	thyroid	NOUN	NN	Number=Sing	24	nmod	24:nmod:of	_
28	in	in	ADP	IN	_	30	case	30:case	_
29	contaminated	contaminate	VERB	VBN	Tense=Past|VerbForm=Part	30	amod	30:amod	_
30	regions	region	NOUN	NNS	Number=Plur	13	nmod	13:nmod:in	_
31	of	of	ADP	IN	_	35	case	35:case	_
32	the	the	DET	DT	Definite=Def|PronType=Art	35	det	35:det	_
33	former	former	ADJ	JJ	Degree=Pos	35	amod	35:amod	_
34	Soviet	Soviet	PROPN	NNP	Number=Sing	35	compound	35:compound	_
35	Union	Union	PROPN	NNP	Number=Sing	30	nmod	30:nmod:of	_
36	(	(	PUNCT	-LRB-	_	37	punct	37:punct	SpaceAfter=No
37	Wi940	Wi940	PROPN	NNP	Number=Sing	30	appos	30:appos	SpaceAfter=No
38	)	)	PUNCT	-RRB-	_	37	punct	37:punct	_
39	which	which	PRON	WDT	PronType=Rel	42	nsubj:pass	13:ref	_
40	should	should	AUX	MD	VerbForm=Fin	42	aux	42:aux	_
41	be	be	AUX	VB	VerbForm=Inf	42	aux:pass	42:aux:pass	_
42	attributed	attribute	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	13	acl:relcl	13:acl:relcl	_
43	to	to	ADP	IN	_	46	case	46:case	_
44	the	the	DET	DT	Definite=Def|PronType=Art	46	det	46:det	_
45	Chernobyl	Chernobyl	PROPN	NNP	Number=Sing	46	compound	46:compound	_
46	accident	accident	NOUN	NN	Number=Sing	42	obl	42:obl:to	_
47	until	until	SCONJ	IN	_	48	mark	48:mark	_
48	proven	prove	VERB	VBN	Tense=Past|VerbForm=Part	42	advcl	42:advcl:until	_
49	otherwise	otherwise	ADV	RB	_	48	xcomp	48:xcomp	SpaceAfter=No
50	.	.	PUNCT	.	_	8	punct	8:punct	_
