Feature Engineering for Drug Name Recognition in Biomedical Texts: Feature Conjunction and Feature Selection

Table 2

Statistics of the DDIExtraction 2013 corpus.

	DrugBank			MEDLINE
	Training	Test	Total	Training	Test	Total
Documents	572	54	626	142	58	200
Sentences	5675	145	5820	1301	520	1821
Drug	8197	180	8377	1228	171	1399
Group	3206	65	3271	193	90	283
Brand	1423	53	1476	14	6	20
No-human	103	5	108	401	115	516