Table 4. F1-measure results for the global context kernel with combination of different feature sets: Negation scope and cue (N), Clause dependency (C), and neuTral candidate (T).
| Category | Global Context (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| - | +N | +C | +T | +NC | +CT | +NT | +NCT | |||
| DrugBank | +Negation | -Connector | 56.6 | 54.9 | 58.6 | 66.2 | 57.8 | 67.2 | 59.8 | 62.1 |
| +Connector | 51.7 | 52.2 | 52.9 | 59.7 | 52.3 | 59.8 | 58.2 | 58.0 | ||
| -Negation | -Connector | 64.7 | 64.8 | 64.8 | 71.8 | 64.8 | 71.9 | 71.9 | 72.9 | |
| +Connector | 62.3 | 62.3 | 65.3 | 65.3 | 63.7 | 66.4 | 65.7 | 65.9 | ||
| Total | 61.7 | 61.3 | 62.9 | 68.6 | 62.4 | 69.0 | 67.5 | 68.3 | ||
| MEDLINE | +Negation | -Connector | 31.1 | 32.6 | 34.2 | 37.5 | 37.2 | 37.4 | 38.2 | 39.2 |
| +Connector | 28.3 | 33.5 | 33.5 | 35.2 | 38.4 | 35.8 | 39.4 | 38.2 | ||
| -Negation | -Connector | 34.6 | 38.7 | 35.4 | 35.4 | 36.1 | 34.8 | 37.5 | 38.4 | |
| +Connector | 34.1 | 38.2 | 36.7 | 37.2 | 35.4 | 36.4 | 39.5 | 40.6 | ||
| Total | 33.9 | 36.6% | 34.2 | 36.0 | 36.8 | 36.7 | 38.4 | 38.8 | ||