| for being | 3 | cause |
| in maintenance | 3 | other |
| more cost | 2 | degree |
| station → be → efficient | 17 |
| station → be designed to be → efficient | 3 |
| negative | neutral | positive |
| 0.008 | 0.172 | 0.820 |
| Raw frequency | 20 |
| Normalized frequency | 0.346 |
| Modifier score | 0.500 |
| Perplexity | 282.053 |