| Typicality: | 0.557 |
| Saliency: | 0.605 |
| to life on the island | 8 | transitive-object |
| because of the terrain in eastern afghanistan | 7 | cause |
| absolutely | 6 | degree |
| helicopter → be → vital | 10 |
| helicopter → be → crucial | 9 |
| helicopter → be → essential | 8 |
| helicopter → be → important | 7 |
| helicopter → be → critical | 4 |
| negative | neutral | positive |
| 0.090 | 0.568 | 0.342 |
| Raw frequency | 38 |
| Normalized frequency | 0.605 |
| Modifier score | 0.650 |
| Perplexity | 28.887 |