From: Integrating unified medical language system and association mining techniques into relevance feedback for biomedical literature search
Sentence
Concept IDs
S1
1, 3, 4, 3, 5
S2
4, 5, 5, 1
S3
3, 5, 1, 3, 1, 6
S4
1, 5, 4, 4, 1
S5
5, 2, 4, 6, 2