| in significant quantities | 4 | other |
| primarily | 3 | degree |
| gas → contain → h2 | 13 |
| gas → contain → h2s | 13 |
| gas → be → h2 | 7 |
| gas → be → h2o | 4 |
| gas → include → h2 | 4 |
| gas → be → h2s | 3 |
| gas → include → h2o | 3 |
| negative | neutral | positive |
| 0.179 | 0.769 | 0.052 |
| Raw frequency | 47 |
| Normalized frequency | 0.494 |
| Modifier score | 0.825 |
| Perplexity | 242.843 |