A CRF-based system for recognizing chemical entity mentions (CEMs) in biomedical literature

Table 4 Official scores for the CEM subtask in the BioCreative IV CHEMDNER competition.

	Run 1	Run 2	Run 3	Run 4	Run 5
cost	2⁻²	2⁻¹	2⁰	2	2-
TP	15,821	16,531	16,991	17,328	17,512
FP	1,834	2,007	2,009	2,129	2,211
FN	9,530	8,820	8,360	8,023	7,839
Precision(%)	89.61	89.17	89.43	89.06	88.79
Recall(%)	62.41	65.21	67.02	68.35	69.08
F₁ score(%)	73.58	75.33	76.62	77.34	77.70
ABBREVIATION	53.90	55.75	56.74	57.63	58.24
FAMILY	59.50	62.20	64.80	66.23	67.28
FORMULA	72.76	74.30	74.88	75.46	75.84
IDENTIFIER	68.62	70.18	69.98	69.79	69.59
MULTIPLE	27.64	32.16	28.64	31.66	31.66
SYSTEMATIC	69.57	72.61	74.32	75.61	76.35
TRIVIAL	58.95	62.73	65.48	67.41	68.26
NO CLASS	51.22	51.22	56.10	58.54	58.54

ISSN: 1758-2946