| sometimes | 19 | degree |
| for the organism | 12 | transitive-object |
| synthetically | 7 | manner |
| mutation → be → lethal | 104 |
| mutation → be → fatal | 26 |
| mutation → cause → lethality | 5 |
| negative | neutral | positive |
| 0.670 | 0.299 | 0.031 |
| Raw frequency | 135 |
| Normalized frequency | 0.770 |
| Modifier score | 0.700 |
| Perplexity | 241.422 |