| Typicality: | 0.364 |
| Saliency: | 0.363 |
| often | 5 | temporal |
| extremely | 5 | degree |
| especially | 5 | degree |
| claim → be difficult to → prove | 33 |
| claim → be hard to → prove | 7 |
| claim → be difficult to → verify | 5 |
| claim → be hard to → demonstrate | 4 |
| negative | neutral | positive |
| 0.589 | 0.385 | 0.026 |
| Raw frequency | 49 |
| Normalized frequency | 0.363 |
| Modifier score | 0.643 |
| Perplexity | 12.750 |