| similarly | 2 | degree |
| despite looking so fragile | 2 | other |
| robustly | 2 | degree |
| fuel cell → be → developed | 13 |
| fuel cell → be → constructed | 4 |
| fuel cell → be → built | 3 |
| fuel cell → be → designed | 3 |
| negative | neutral | positive |
| 0.103 | 0.626 | 0.271 |
| Raw frequency | 23 |
| Normalized frequency | 0.409 |
| Modifier score | 0.500 |
| Perplexity | 154.579 |