| mainly | 3 | degree |
| with chlorine | 3 | other |
| with potassium | 2 | other |
| sample → contain → iron | 8 |
| sample → be → iron | 7 |
| sample → have → iron | 3 |
| negative | neutral | positive |
| 0.120 | 0.822 | 0.058 |
| Raw frequency | 18 |
| Normalized frequency | 0.244 |
| Modifier score | 0.820 |
| Perplexity | 185.944 |