| to reach them | 5 | purpose |
| along with other system checks | 5 | other |
| to haul the cars | 5 | purpose |
| engine → be → required | 73 |
| engine → be → necessary | 30 |
| engine → be → need | 9 |
| engine → be → must | 5 |
| engine → be → needs | 3 |
| engine → be → requirement | 3 |
| negative | neutral | positive |
| 0.173 | 0.602 | 0.225 |
| Raw frequency | 123 |
| Normalized frequency | 0.600 |
| Modifier score | 0.525 |
| Perplexity | 213.275 |