| more fuel | 14 | other |
| extremely | 10 | degree |
| at a high altitude | 7 | other |
| aircraft → be → efficient | 64 |
| aircraft → be → more efficient | 39 |
| aircraft → become → more efficient | 10 |
| aircraft → become → efficient | 3 |
| negative | neutral | positive |
| 0.026 | 0.282 | 0.692 |
| Raw frequency | 116 |
| Normalized frequency | 0.675 |
| Modifier score | 0.650 |
| Perplexity | 346.965 |