Table 3.

Evaluation of the system. P0 represents the precision of the top-answer. R5 is the recall at five documents.

Search engine	easyIR		PubMed		Combination
Measure	P0	R5	P0	R5	P0	R5
UMLS T195 target	0.1200	0.0938	0.1628	0.1481	0.1280	0.1042
WHO-ATC target	0.5103	0.3594	0.5186	0.3770	0.5402	0.3776
Hybrid target	0.5446	0.3672	0.5380	0.4172	0.5539	0.3802
Relaxing constraint (level1)	0.5864	0.4583	0.6371	0.5437	0.6109	0.4766
Relaxing constraint (level2)	0.8098	0.7682	0.7738	0.7750	0.8317	0.7024