| in the lip region | 9 | location |
| in other cases | 4 | temporal |
| because of pollution | 3 | cause |
| membrane → be → thicker | 12 |
| membrane → become → thicker | 6 |
| membrane → grow → thicker | 3 |
| negative | neutral | positive |
| 0.294 | 0.605 | 0.100 |
| Raw frequency | 21 |
| Normalized frequency | 0.368 |
| Modifier score | 0.400 |
| Perplexity | 219.874 |