| Typicality: | 0.375 |
| Saliency: | 0.293 |
| to enjoy maximum efficiency | 3 | purpose |
| to remove dirt | 3 | purpose |
| solar panel → need → regular cleaning | 5 |
| solar panel → be cleaned on → regular basis | 4 |
| solar panel → cleaned on → regular basis | 3 |
| solar panel → need → periodic cleaning | 3 |
| negative | neutral | positive |
| 0.301 | 0.469 | 0.230 |
| Raw frequency | 15 |
| Normalized frequency | 0.293 |
| Modifier score | 0.500 |
| Perplexity | 92.021 |