| extremely | 4 | degree |
| to humans | 2 | transitive-object |
| for the environment | 2 | purpose |
| butane → be → toxic | 8 |
| butane → be → harmful | 4 |
| negative | neutral | positive |
| 0.930 | 0.066 | 0.004 |
| Raw frequency | 12 |
| Normalized frequency | 0.512 |
| Modifier score | 0.500 |
| Perplexity | 349.674 |