| Typicality: | 0.391 |
| Saliency: | 0.330 |
| currently | 4 | temporal |
| according to the national cancer institute | 4 | other |
| since 1976 | 2 | temporal |
| vaccine → be used in → clinical trial | 6 |
| vaccine → be studied in → trial | 6 |
| vaccine → be used in → the trial | 5 |
| vaccine → be used in → clinical trials | 5 |
| vaccine → be evaluated in → clinical trials | 3 |
| vaccine → be investigated in → clinical study | 3 |
| vaccine → be evaluated in → clinical studies | 3 |
| vaccine → be used in → trial | 3 |
| negative | neutral | positive |
| 0.143 | 0.789 | 0.068 |
| Raw frequency | 34 |
| Normalized frequency | 0.330 |
| Modifier score | 0.500 |
| Perplexity | 91.599 |