Evaluating Word Representation Features in Biomedical Named Entity Recognition Tasks

Table 2

Examples of named entities represented by BIO labels. The first sentence comes from the JNLPBA corpus and the second sentence comes from the BioCreAtIvE II GM corpus.

Example 1	Token	IL-2	gene	expression	and	NF-kappa	B	activation	⋯
	Label	B-DNA	I-DNA	O	O	B-protein	I-protein	O	⋯
Example 2	Token	Comparison	with	alkaline	phosphatases	and	5	—	nucleotidase
	Label	O	O	B-GM	I-GM	O	B-GM	I-GM	I-GM