| over silica | 4 | location |
| during night operations at the time | 4 | temporal |
| over motor vehicle salvage | 2 | other |
| problem → be related to → control | 39 |
| problem → be associated with → control | 32 |
| problem → involve → control | 7 |
| problem → relate to → control | 6 |
| problem → be related to → the control | 4 |
| problem → pertain to → control | 3 |
| negative | neutral | positive |
| 0.237 | 0.548 | 0.215 |
| Raw frequency | 91 |
| Normalized frequency | 0.403 |
| Modifier score | 0.733 |
| Perplexity | 95.168 |