| Typicality: | 0.543 |
| Saliency: | 0.382 |
| from subsurface porous rock reservoirs | 7 | location |
| from pennsylvania | 2 | location |
| natural gas → be extracted through → hydraulic fracturing | 5 |
| natural gas → be mined through → hydraulic fracturing | 4 |
| natural gas → be produced by → hydraulic fracturing | 3 |
| natural gas → be extracted via → hydraulic fracturing | 3 |
| negative | neutral | positive |
| 0.275 | 0.662 | 0.063 |
| Raw frequency | 15 |
| Normalized frequency | 0.382 |
| Modifier score | 0.900 |
| Perplexity | 34.111 |