Table 5. F1-measure results for the subtree kernel with combination of different feature sets: Negation scope and cue (N), Clause dependency (C), and neuTral candidate (T).
| Category | SubTree (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| - | +N | +C | +T | +NC | +CT | +NT | +NCT | |||
| DrugBank | +Negation | -Connector | 60.9 | 59.2 | 59.9 | 66.9 | 68.9 | 59.9 | 70.2 | 68.5 |
| +Connector | 63.2 | 63.1 | 62.6 | 63.2 | 62.7 | 63.2 | 63.1 | 63.3 | ||
| -Negation | -Connector | 58.6 | 62.9 | 59.7 | 68.5 | 59.5 | 68.4 | 73.9 | 73.9 | |
| +Connector | 36.3 | 36.3 | 36.3 | 38.7 | 36.3 | 38.6 | 36.3 | 39.1 | ||
| Total | 47.1 | 47.6 | 47.1 | 51.4 | 48.7 | 50.1 | 51.6 | 53.0 | ||
| MEDLINE | +Negation | -Connector | 18.7 | 19.9 | 20.2 | 20.8 | 19.8 | 22.6 | 23.5 | 22.7 |
| +Connector | 17.9 | 19.4 | 19.6 | 19.6 | 17.3 | 18.7 | 20.7 | 23.1 | ||
| -Negation | -Connector | 18.9 | 18.8 | 19.8 | 20.9 | 19.7 | 19.7 | 20.7 | 19.8 | |
| +Connector | 18.2 | 19.6 | 19.1 | 19.8 | 15.8 | 18.6 | 20.6 | 18.4 | ||
| Total | 18.4 | 19.8 | 19.6 | 19.9 | 19.6 | 20.3 | 21.4 | 21.5 | ||