| until world war ii | 3 | temporal |
| from naphtha | 3 | other |
| benzene → be → formed | 13 |
| benzene → be → produced | 5 |
| benzene → be produced as → a by | 3 |
| negative | neutral | positive |
| 0.278 | 0.681 | 0.041 |
| Raw frequency | 21 |
| Normalized frequency | 0.547 |
| Modifier score | 0.900 |
| Perplexity | 85.995 |