Table 5.

F-scores of Combining Lexical and Semantic Information.

Feature	6-way		5-way
		S	U	S	U
1.P+2.P	67.87	60.53	81.10	68.47
1.P+T-CUI	67.83	61.01	79.94	67.41
1.P+T-Syn	66.13	59.79	78.26	67.39
1.P+T-Syn-B	67.03	61.24	79.09	68.51
1.P+T-CUI+T-Syn	65.89	60.23	77.85	66.82
1.P+T-CUI+T-Syn-B	66.82	61.28	78.90	68.27

1.P: unigrams with POS, 2.P: bigrams with POS, T: Token, CUI: UMLS tag, Syn: expansion with synonyms, Syn-B: synonyms in break-down form. Best results per column are given in bold.