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Table 2 Counts and frequencies given the example article and Q

From: Integrating unified medical language system and association mining techniques into relevance feedback for biomedical literature search

Sentence CNT (Q)S i CNT ({1})S i CNT(Q {1})S i
S1 1/3 1 1/3
S2 0 1 0
S3 2/3 1 2/3
S4 0 1 0
S5 2/3 0 0
Sum 5/3 (f W Q ) 4 (f {1}) 1 (f W Q{1} )