| Typicality: | 0.430 |
| Saliency: | 0.422 |
| in fuel cell vehicles | 6 | location |
| via photophosphorylation | 4 | manner |
| in the future | 3 | temporal |
| hydrogen → be → an energy source | 11 |
| hydrogen → be used as → an energy source | 7 |
| hydrogen → be used to generate → chemical energy | 4 |
| hydrogen → be used for → energy | 4 |
| hydrogen → be → a source of energy | 3 |
| negative | neutral | positive |
| 0.184 | 0.635 | 0.181 |
| Raw frequency | 29 |
| Normalized frequency | 0.422 |
| Modifier score | 0.500 |
| Perplexity | 13.416 |