| from black liquor | 6 | other |
| by using the process | 6 | manner |
| by adding sulphuric acid | 4 | manner |
| lignin → be → separated | 18 |
| lignin → be → isolated | 9 |
| negative | neutral | positive |
| 0.139 | 0.776 | 0.085 |
| Raw frequency | 27 |
| Normalized frequency | 0.674 |
| Modifier score | 0.500 |
| Perplexity | 410.065 |