| sometimes | 4 | temporal |
| by poison gas | 2 | manner |
| every year | 2 | temporal |
| mistake → cause → fatality | 5 |
| mistake → result in → fatality | 5 |
| negative | neutral | positive |
| 0.833 | 0.157 | 0.009 |
| Raw frequency | 10 |
| Normalized frequency | 0.179 |
| Modifier score | 0.675 |
| Perplexity | 83.633 |