| very | 9 | degree |
| over time | 4 | temporal |
| more quickly | 2 | manner |
| furnace → be → dirty | 26 |
| furnace → get → dirty | 6 |
| furnace → become → dirty | 5 |
| negative | neutral | positive |
| 0.783 | 0.201 | 0.016 |
| Raw frequency | 37 |
| Normalized frequency | 0.543 |
| Modifier score | 0.500 |
| Perplexity | 430.735 |