| from renewable biomass | 4 | other |
| from butyrate | 3 | location |
| commercially | 2 | manner |
| butanol → be → produced | 18 |
| butanol → be → synthesized | 3 |
| negative | neutral | positive |
| 0.131 | 0.723 | 0.146 |
| Raw frequency | 21 |
| Normalized frequency | 1.000 |
| Modifier score | 0.450 |
| Perplexity | 460.873 |