Table 7.

Evaluation result of key sentence extraction and the performance change when omitting a feature class.

Class/Feature Group	All			No Token			No Sentence			No Named Entity			No MeSH			No Lexica
	P	R	F	P	R	F	P	R	F	P	R	F	P	R	F	P	R	F
Patient	.70	.24	.36	−.13	+.08	+.05	−.10	−.04	−.03	+.02	−.01	0	0	+.02	+.02	−.05	−.01	−.02
Intervention	.78	.56	.65	−.40	−.10	−.17	−.14	−.05	−.07	−.04	−.03	−.04	−.07	−.07	−.09	−.04	−.03	−.04
Result	.90	.28	.43	−.17	−.23	−.22	−.02	+.02	+.01	−.01	0	0	−.01	+.02	+.01	−.02	−.01	0
Study Design	.89	.39	.54	−.56	−.29	−.39	−.09	−.04	−.05	−.01	−.05	−.05	−.01	+.03	+.03	0	+.01	0
Research Goal	.92	.27	.43	−.47	−.08	−.16	+.03	−.01	−.02	−.05	+.02	+.01	+.04	+.03	+.04	+.03	−.01	−.02