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| 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) | | | | | | | -score under one class | 0 | 42.05 | 3.50 | 27.11 | 7.33 | 5.48 | Average contribution | 0 | 0.001 | | 0.003 | | | (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 |
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