| to ensure | 13 | purpose |
| as the only time | 10 | temporal |
| for alternative energy sources | 3 | purpose |
| price → be → necessary | 77 |
| price → be → need | 19 |
| price → be → the need | 11 |
| negative | neutral | positive |
| 0.222 | 0.655 | 0.123 |
| Raw frequency | 107 |
| Normalized frequency | 0.423 |
| Modifier score | 0.643 |
| Perplexity | 115.063 |