| to produce gas | 7 | purpose |
| widely | 4 | degree |
| no longer | 3 | temporal |
| plant → burn → coal | 21 |
| plant → be used in → coal | 3 |
| plant → produce → coal | 3 |
| negative | neutral | positive |
| 0.243 | 0.673 | 0.084 |
| Raw frequency | 27 |
| Normalized frequency | 0.363 |
| Modifier score | 0.500 |
| Perplexity | 429.362 |