| depending on the model | 4 | other |
| inside | 2 | location |
| to tackle pollutant particles | 2 | purpose |
| unit → have → filter | 32 |
| unit → come with → filter | 10 |
| unit → use → filter | 10 |
| unit → require → filter | 6 |
| unit → consist of → filter | 4 |
| negative | neutral | positive |
| 0.153 | 0.626 | 0.221 |
| Raw frequency | 62 |
| Normalized frequency | 0.419 |
| Modifier score | 0.714 |
| Perplexity | 491.608 |