Requirements:
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	Python: 3.7   
	PyTorch: 1.1.0 

Input format:
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Input is in CoNLL format (We use BIO tag scheme), where each character and its label are in one line. Sentences are split with a null line.

Naloxone	B-Chemical
reverses	O
the	O
antihypertensive	O
effect	O
of	O
clonidine	B-Chemical
.	O