| at certain concentrations | 7 | location |
| highly | 5 | degree |
| potentially | 5 | degree |
| methane → be → explosive | 34 |
| methane → become → explosive | 6 |
| methane → be → explosive gas | 3 |
| negative | neutral | positive |
| 0.706 | 0.266 | 0.028 |
| Raw frequency | 43 |
| Normalized frequency | 0.564 |
| Modifier score | 0.500 |
| Perplexity | 81.816 |