Table 6. F1-measure results for the local context kernel with combination of different feature sets: Negation scope and cue (N), Clause dependency (C), and neuTral candidate (T).
| Category | Local Context (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| - | +N | +C | +T | +NC | +CT | +NT | +NCT | |||
| DrugBank | +Negation | -Connector | 62.6 | 63.4 | 62.8 | 66.0 | 61.5 | 65.7 | 65.6 | 65.2 |
| +Connector | 58.0 | 52.2 | 60.9 | 67.2 | 50.9 | 67.8 | 64.8 | 63.1 | ||
| -Negation | -Connector | 64.8 | 65.9 | 64.9 | 66.2 | 65.7 | 66.9 | 68.9 | 69.5 | |
| +Connector | 63.9 | 65.3 | 63.9 | 69.6 | 64.2 | 70.0 | 69.9 | 69.9 | ||
| Total | 63.4 | 64.1 | 63.7 | 68.1 | 63.0 | 68.5 | 68.5 | 68.4 | ||
| MEDLINE | +Negation | -Connector | 39.4 | 43.4 | 49.2 | 51.2 | 48.5 | 46.8 | 48.6 | 50.6 |
| +Connector | 40.1 | 44.2 | 50.2 | 48.4 | 53.8 | 48.9 | 50.2 | 50.1 | ||
| -Negation | -Connector | 44.2 | 37.2 | 42.5 | 42.6 | 45.9 | 52.9 | 44.7 | 48.7 | |
| +Connector | 41.7 | 48.4 | 43.2 | 49.8 | 46.1 | 47.3 | 48.1 | 44.8 | ||
| Total | 42.3 | 43.5 | 45.7 | 46.5 | 47.7 | 48.3 | 47.9 | 48.2 | ||