| completely | 18 | degree |
| with soot | 13 | other |
| by encapsulating material | 8 | manner |
| surface → be → covered | 286 |
| surface → be → cover | 3 |
| negative | neutral | positive |
| 0.126 | 0.710 | 0.164 |
| Raw frequency | 289 |
| Normalized frequency | 0.676 |
| Modifier score | 0.978 |
| Perplexity | 75.001 |