| without them | 7 | other |
| in the united states | 4 | location |
| in 1916 | 3 | temporal |
| polio → be → rampant | 7 |
| polio → be → epidemic | 6 |
| polio → be → widespread | 6 |
| negative | neutral | positive |
| 0.649 | 0.287 | 0.064 |
| Raw frequency | 19 |
| Normalized frequency | 0.466 |
| Modifier score | 0.500 |
| Perplexity | 93.940 |