| from the mineral pentlandite | 8 | other |
| from pyrrhotite | 8 | location |
| commercially | 4 | manner |
| nickel → be → extracted | 12 |
| nickel → be → obtained | 10 |
| negative | neutral | positive |
| 0.077 | 0.862 | 0.060 |
| Raw frequency | 22 |
| Normalized frequency | 0.453 |
| Modifier score | 0.850 |
| Perplexity | 78.436 |