| Typicality: | 0.410 |
| Saliency: | 0.579 |
| further east | 3 | location |
| since affected countries | 3 | temporal |
| such as sudan | 3 | other |
| virus → be discovered in → 1976 | 46 |
| virus → be identified in → 1976 | 15 |
| virus → appear in → 1976 | 6 |
| virus → emerge in → 1976 | 4 |
| virus → be reported in → 1976 | 3 |
| virus → be detected in → 1976 | 3 |
| negative | neutral | positive |
| 0.631 | 0.349 | 0.021 |
| Raw frequency | 77 |
| Normalized frequency | 0.579 |
| Modifier score | 0.500 |
| Perplexity | 45.985 |