| naturally | 5 | manner |
| by melting the solid fuel | 5 | manner |
| during the construction work | 4 | temporal |
| pool → be → formed | 49 |
| pool → be → produced | 5 |
| negative | neutral | positive |
| 0.126 | 0.693 | 0.181 |
| Raw frequency | 54 |
| Normalized frequency | 0.422 |
| Modifier score | 0.500 |
| Perplexity | 418.945 |