| Typicality: | 0.395 |
| Saliency: | 0.341 |
| by leaking along the bore hole | 4 | manner |
| methane → reach → the surface | 5 |
| methane → migrate to → the surface | 4 |
| methane → get to → the surface | 3 |
| methane → escape to → the surface | 3 |
| negative | neutral | positive |
| 0.348 | 0.624 | 0.028 |
| Raw frequency | 15 |
| Normalized frequency | 0.341 |
| Modifier score | 0.500 |
| Perplexity | 250.063 |