| at room temperature | 6 | other |
| during the early eocene | 3 | temporal |
| with the highest contribution | 2 | other |
| methane → be → gas | 45 |
| methane → be → the gas | 8 |
| methane → be → another gas | 4 |
| negative | neutral | positive |
| 0.314 | 0.637 | 0.049 |
| Raw frequency | 57 |
| Normalized frequency | 0.624 |
| Modifier score | 0.800 |
| Perplexity | 24.497 |