| more fuel | 3 | other |
| at moving people | 3 | transitive-object |
| relatively | 2 | degree |
| railroad → be → efficient | 10 |
| railroad → be → more efficient | 7 |
| railroad → become → more efficient | 3 |
| negative | neutral | positive |
| 0.042 | 0.404 | 0.554 |
| Raw frequency | 20 |
| Normalized frequency | 0.387 |
| Modifier score | 0.500 |
| Perplexity | 71.355 |