| to a sample | 8 | other |
| with the indoor sample(s | 6 | other |
| between different groups | 5 | other |
| sample → be → compared | 148 |
| sample → be taken for → comparison | 7 |
| sample → be used for → comparison | 6 |
| sample → be included for → comparison | 5 |
| sample → be measured in → comparison | 4 |
| sample → be prepared for → comparison | 4 |
| sample → be used as → comparison | 3 |
| negative | neutral | positive |
| 0.093 | 0.822 | 0.085 |
| Raw frequency | 177 |
| Normalized frequency | 0.555 |
| Modifier score | 0.957 |
| Perplexity | 435.691 |