| Typicality: | 0.303 |
| Saliency: | 0.329 |
| in the longer term | 9 | temporal |
| due to cleanliness | 4 | cause |
| for years | 3 | temporal |
| natural gas → gain → popularity | 5 |
| natural gas → gain in → popularity | 4 |
| natural gas → grow in → popularity | 3 |
| negative | neutral | positive |
| 0.010 | 0.205 | 0.785 |
| Raw frequency | 12 |
| Normalized frequency | 0.329 |
| Modifier score | 0.500 |
| Perplexity | 154.941 |