| Typicality: | 0.404 |
| Saliency: | 0.240 |
| currently | 4 | temporal |
| in poor weather | 3 | location |
| under the visual flight rules | 3 | other |
| aircraft → operate at → night | 8 |
| aircraft → be operated at → night | 3 |
| negative | neutral | positive |
| 0.186 | 0.642 | 0.172 |
| Raw frequency | 11 |
| Normalized frequency | 0.240 |
| Modifier score | 0.660 |
| Perplexity | 151.554 |