| in any incidence of ed | 6 | other |
| very | 4 | degree |
| in clinical trials | 2 | location |
| viagra → be → helpful | 7 |
| viagra → be → useful | 6 |
| viagra → be → good | 6 |
| viagra → be → recommended | 4 |
| negative | neutral | positive |
| 0.076 | 0.479 | 0.445 |
| Raw frequency | 23 |
| Normalized frequency | 0.542 |
| Modifier score | 0.500 |
| Perplexity | 108.865 |