| for the type of appliance | 7 | other |
| for the environment | 7 | purpose |
| for newer vehicles | 2 | transitive-object |
| fuel → be → safe | 43 |
| fuel → be safe to → use | 3 |
| negative | neutral | positive |
| 0.096 | 0.376 | 0.529 |
| Raw frequency | 46 |
| Normalized frequency | 0.530 |
| Modifier score | 0.000 |
| Perplexity | 230.516 |