| Typicality: | 0.379 |
| Saliency: | 0.302 |
| in place | 3 | location |
| trench → have → protective system | 8 |
| trench → require → protective system | 3 |
| negative | neutral | positive |
| 0.095 | 0.851 | 0.054 |
| Raw frequency | 11 |
| Normalized frequency | 0.302 |
| Modifier score | 0.500 |
| Perplexity | 310.911 |