Relation extraction between bacteria and biotopes from biomedical texts with attention mechanisms and domain-specific contextual representations

Table 7 Statistics of a DDI dataset

	DDI type	Train	Dev	Test
Positive instances	Mechanism	1054	263	301
	Effect	1349	336	359
	Advice	660	164	220
	Int	139	37	95
Negative instances	False	19015	4753	4363
Total instances		22227	5553	5338

ISSN: 1471-2105