| Typicality: | 0.413 |
| Saliency: | 0.382 |
| in the mid twentieth century | 6 | temporal |
| due to fracking | 3 | cause |
| natural gas → become → plentiful | 7 |
| natural gas → become → abundant | 4 |
| natural gas → become → more abundant | 4 |
| negative | neutral | positive |
| 0.107 | 0.475 | 0.418 |
| Raw frequency | 15 |
| Normalized frequency | 0.382 |
| Modifier score | 0.500 |
| Perplexity | 88.260 |