| Typicality: | 0.567 |
| Saliency: | 0.362 |
| currently | 5 | temporal |
| in africa | 4 | location |
| decades earlier | 2 | temporal |
| vaccine → be tested in → clinical trials | 21 |
| vaccine → be tested in → this study | 7 |
| vaccine → be tested in → human clinical trials | 5 |
| vaccine → be tested in → trial | 4 |
| vaccine → be tested in → clinical trial | 3 |
| vaccine → be tested in → study | 3 |
| negative | neutral | positive |
| 0.109 | 0.715 | 0.176 |
| Raw frequency | 43 |
| Normalized frequency | 0.362 |
| Modifier score | 1.000 |
| Perplexity | 61.753 |