| from the bark of trees | 8 | location |
| from vinblastine | 2 | location |
| quinine → be → extracted | 7 |
| quinine → be → derived | 7 |
| quinine → be → obtained | 3 |
| negative | neutral | positive |
| 0.094 | 0.813 | 0.093 |
| Raw frequency | 17 |
| Normalized frequency | 0.567 |
| Modifier score | 0.500 |
| Perplexity | 149.558 |