| Typicality: | 0.539 |
| Saliency: | 0.298 |
| artificially | 2 | manner |
| from petroleum products | 2 | other |
| a century ago | 2 | temporal |
| chemical → be → synthesized | 12 |
| chemical → be used in → the synthesis | 3 |
| chemical → be → synthesised | 3 |
| negative | neutral | positive |
| 0.207 | 0.614 | 0.179 |
| Raw frequency | 18 |
| Normalized frequency | 0.298 |
| Modifier score | 1.000 |
| Perplexity | 159.130 |