| Typicality: | 0.375 |
| Saliency: | 0.498 |
| with an epidemic in new york | 5 | other |
| from mammals including horses | 3 | other |
| from africa | 2 | location |
| virus → be detected in → 1999 | 15 |
| virus → be identified in → 1999 | 12 |
| virus → appear in → 1999 | 10 |
| virus → be discovered in → 1999 | 5 |
| virus → be found in → 1999 | 4 |
| virus → arrive in → 1999 | 3 |
| negative | neutral | positive |
| 0.496 | 0.484 | 0.021 |
| Raw frequency | 49 |
| Normalized frequency | 0.498 |
| Modifier score | 0.500 |
| Perplexity | 79.058 |