| very | 7 | degree |
| as sources of fluorine | 4 | manner |
| for healthy teeth | 2 | purpose |
| fluorine → be → useful | 6 |
| fluorine → be → essential | 4 |
| fluorine → be → beneficial | 3 |
| fluorine → play → important role | 3 |
| negative | neutral | positive |
| 0.096 | 0.377 | 0.527 |
| Raw frequency | 16 |
| Normalized frequency | 0.653 |
| Modifier score | 0.500 |
| Perplexity | 59.564 |