| in the days before motorisation | 7 | temporal |
| obviously | 4 | degree |
| on our planet | 4 | location |
| wind → be → energy | 12 |
| wind → be → a source of energy | 7 |
| wind → be → important source of energy | 4 |
| wind → be → the energy | 4 |
| wind → be → powerful source of energy | 4 |
| wind → be → an energy source | 4 |
| wind → be → the energy source | 4 |
| wind → be → energy sources | 3 |
| negative | neutral | positive |
| 0.109 | 0.498 | 0.394 |
| Raw frequency | 42 |
| Normalized frequency | 0.357 |
| Modifier score | 1.000 |
| Perplexity | 168.499 |