| Typicality: | 0.426 |
| Saliency: | 0.412 |
| in children | 5 | transitive-object |
| to prevent the flu | 4 | purpose |
| in the 1950s | 4 | temporal |
| vaccine → protect against → polio | 27 |
| vaccine → prevent → polio | 25 |
| vaccine → be used to prevent → polio | 7 |
| vaccine → stop → polio | 3 |
| negative | neutral | positive |
| 0.221 | 0.550 | 0.228 |
| Raw frequency | 62 |
| Normalized frequency | 0.412 |
| Modifier score | 0.500 |
| Perplexity | 65.686 |