| to protect public health | 5 | purpose |
| properly | 2 | manner |
| often | 2 | temporal |
| chemical → be → screened | 8 |
| chemical → be → checked | 5 |
| chemical → be screened for → safety | 3 |
| negative | neutral | positive |
| 0.284 | 0.579 | 0.137 |
| Raw frequency | 16 |
| Normalized frequency | 0.278 |
| Modifier score | 0.817 |
| Perplexity | 102.308 |