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Number of documents necessary to cover all relevant UMLS entities—present in the summary— according to three different ordering strategies. FORWARD orders the notes chronologically, BACKWARD the reverse, and GREEDY ORACLE examines notes in order of decreasing entity overlap with the target.
| Avg Notes to Read | ||
|---|---|---|
| Ordering | Number | Percent |
| FORWARD | 8.5 | 0.80 |
| BACKWARD | 7.8 | 0.73 |
| GREEDY ORACLE | 5.0 | 0.50 |
