| prior to | 5 | temporal |
| between 2006 | 2 | temporal |
| aircraft → be → secure | 11 |
| aircraft → be → secured | 11 |
| aircraft → be secured for → flight | 3 |
| negative | neutral | positive |
| 0.086 | 0.670 | 0.244 |
| Raw frequency | 25 |
| Normalized frequency | 0.392 |
| Modifier score | 0.500 |
| Perplexity | 437.356 |