| across the world | 2 | location |
| gas → be found in → shale | 4 |
| gas → be trapped in → shale formations | 3 |
| gas → be contained in → the shale | 3 |
| negative | neutral | positive |
| 0.238 | 0.618 | 0.144 |
| Raw frequency | 10 |
| Normalized frequency | 0.216 |
| Modifier score | 0.500 |
| Perplexity | 255.844 |