| naturally | 8 | manner |
| to improve performance characteristics | 5 | purpose |
| frequently | 4 | temporal |
| chemical → be found in → gasoline | 10 |
| chemical → occur in → gasoline | 8 |
| chemical → be used in → gasoline | 7 |
| chemical → be added to → gasoline | 4 |
| chemical → be → gasoline | 4 |
| chemical → include → gasoline | 4 |
| negative | neutral | positive |
| 0.332 | 0.580 | 0.089 |
| Raw frequency | 37 |
| Normalized frequency | 0.418 |
| Modifier score | 0.813 |
| Perplexity | 155.503 |