| from them | 6 | other |
| from mines | 4 | location |
| from the deposits | 3 | location |
| methane → be → extracted | 66 |
| methane → be → recovered | 11 |
| negative | neutral | positive |
| 0.301 | 0.636 | 0.063 |
| Raw frequency | 77 |
| Normalized frequency | 0.688 |
| Modifier score | 0.650 |
| Perplexity | 157.228 |