| very | 15 | degree |
| as gasoline | 6 | other |
| currently | 5 | temporal |
| hydrogen → be → expensive | 27 |
| hydrogen → be → costly | 9 |
| hydrogen → be expensive to → produce | 5 |
| hydrogen → be expensive to → compete | 3 |
| negative | neutral | positive |
| 0.562 | 0.312 | 0.126 |
| Raw frequency | 44 |
| Normalized frequency | 0.499 |
| Modifier score | 0.500 |
| Perplexity | 31.891 |