| to control direction | 3 | purpose |
| in the event of an emergency | 2 | temporal |
| bus → have → system | 6 |
| bus → be equipped with → system | 4 |
| negative | neutral | positive |
| 0.084 | 0.774 | 0.142 |
| Raw frequency | 10 |
| Normalized frequency | 0.211 |
| Modifier score | 1.000 |
| Perplexity | 287.330 |