Table 1.

Performance of NER Systems

	Token-level			Field-level
	precis.	recall	F1	precis.	recall	F1
development set
likely-protein	0.816	0.313	0.452	0.667	0.268	0.382
possible-protein	0.439	0.885	0.587	0.304	0.566	0.396
dictionary	0.501	0.469	0.484	0.245	0.439	0.314
YAPEX test
likely-protein	0.949	0.648	0.770	0.872	0.621	0.725
possible-protein	0.490	0.974	0.652	0.472	0.825	0.600
YAPEX system				0.678	0.664	0.671

Performance of the NER systems on the mouse development corpus and the YAPEX test corpus. The row labeled "dictionary" is for simple dictionary lookup using the mouse synonym list. The row labeled "YAPEX system" is from [15].