| with the development of the technology | 2 | other |
| at low altitude | 2 | location |
| aircraft → be → safer | 25 |
| aircraft → become → safer | 3 |
| negative | neutral | positive |
| 0.045 | 0.265 | 0.691 |
| Raw frequency | 28 |
| Normalized frequency | 0.413 |
| Modifier score | 0.500 |
| Perplexity | 410.765 |