| from the biomass | 7 | other |
| from black liquor | 5 | other |
| in order to make high-white papers | 4 | purpose |
| lignin → be → extracted | 28 |
| lignin → be → recovered | 12 |
| lignin → be → obtained | 10 |
| negative | neutral | positive |
| 0.090 | 0.775 | 0.136 |
| Raw frequency | 50 |
| Normalized frequency | 0.864 |
| Modifier score | 0.900 |
| Perplexity | 232.661 |