Table 7.
The best feature combination after choosing features dynamically in trigger and edge detection.
| 1 | 2 | 3 | 4 | 5 | 6 | |
|---|---|---|---|---|---|---|
| Feature in trigger | #Sentence feature | #Main feature | #Linear order | #Content feature | #Attached edge | #Chain feature |
| Feature | Feature | |||||
| Feature size | 18998 | 24944 | 73744 | 8573 | 100561 | 178345 |
| (Merely one feature analysis) | ||||||
| F-score under one class | 0 | 42.05 | 3.50 | 27.11 | 7.33 | 5.48 |
| Average contribution | 0 | 0.001 | 4e − 5 | 0.003 | 7e − 5 | 3e − 5 |
| (Double feature combination analysis) | ||||||
| Best performance | (+4) | (+4) | (+4) | (+1) | (+2) | (+4) |
| Involving ith feature | 45.39 | 36.65 | 22.29 | 45.39 | 28.27 | 23.48 |
| Worst performance | (+2) | (+1) | (+1) | (+3) | (+1) | (+1) |
| Involving ith feature | 0 | 0 | 0 | 22.29 | 0.91 | 3.10 |
| (Three-feature combination analysis) | ||||||
| Best performance | (+4, 5) | (+1, 4) | (+1, 4) | (+1, 5) | (+1, 4) | (+1, 4) |
| Involving ith feature | 49.44 | 47.82 | 45.13 | 49.44 | 49.44 | 45.51 |
| Worst performance | (+2, 3) | (+1, 3) | (+1, 2) | (+3, 6) | (+1, 3) | (+1, 3) |
| Involving ith feature | 0.11 | 0.11 | 0.11 | 20.76 | 1.98 | 2.40 |
| (Four-feature combination analysis) | ||||||
| Best performance | (+2, 4, 5) | (+1, 4, 5) | (+1, 4, 5) | (+1, 2, 5) | (+1, 2, 4) | (+1, 2, 4) |
| Involving ith feature | 50.71 | 50.71 | 49.74 | 50.71 | 50.71 | 48.82 |
| Worst performance | (+2, 3, 6) | (+1, 3, 6) | (+1, 2, 6) | (+3, 5, 6) | (+1, 2, 3) | (+1, 2, 3) |
| Involving ith feature | 5.77 | 5.77 | 5.77 | 21.13 | 7.02 | 5.77 |
| (Five-feature combination analysis) | ||||||
| Performance | ||||||
| Without ith feature | 34.22 | 47.1 | 49.90 | 16.37 | 50.19 | 51.34 |