Table 2. Inter-annotator agreement between each annotator and the gold standard.

		Explicit	Implicit
A1	True positive	13787	3577
	False positive	1495	465
	False negative	924	302
	k	0.8901	0.8937
A2	True positive	13116	3328
	False positive	1679	596
	False negative	972	389
	k	0.8768	0.8590