Table 3. The number of concepts from each semantic group that were used by each annotator and the reference standard for coding the 20 medical text snippets.

Semantic group	Annotator 1	Annotator 2	Reference standard
Disorder	69	98	94
Objects	1	2	2
Living Beings	0	0	0
Devices	2	1	1
Chemicals and Drugs	12	10	10
Procedures	28	31	33
Genes and Molecular Sequences	0	0	0
Concepts and Ideas	68	64	65
Anatomy	67	38	56