| Typicality: | 0.502 |
| Saliency: | 0.590 |
| almost entirely of methane | 6 | other |
| years ago | 5 | temporal |
| beneath the surface of the earth | 3 | location |
| natural gas → be → formed | 26 |
| natural gas → be formed → million | 5 |
| natural gas → be → composed | 5 |
| negative | neutral | positive |
| 0.202 | 0.724 | 0.075 |
| Raw frequency | 36 |
| Normalized frequency | 0.590 |
| Modifier score | 0.500 |
| Perplexity | 263.326 |