| Typicality: | 0.597 |
| Saliency: | 0.812 |
| in the united states | 15 | location |
| in western europe | 6 | location |
| very | 6 | degree |
| rheumatic fever → be → rare | 24 |
| rheumatic fever → become → rare | 5 |
| negative | neutral | positive |
| 0.286 | 0.588 | 0.125 |
| Raw frequency | 29 |
| Normalized frequency | 0.812 |
| Modifier score | 0.500 |
| Perplexity | 52.573 |