| for erectile dysfunction | 6 | purpose |
| for abnormal enhancement of center | 3 | purpose |
| viagra → be → medicine | 24 |
| viagra → be → medication | 23 |
| viagra → be → remedy | 9 |
| viagra → be → treatment | 4 |
| viagra → be used as → therapy | 3 |
| negative | neutral | positive |
| 0.228 | 0.656 | 0.116 |
| Raw frequency | 63 |
| Normalized frequency | 0.809 |
| Modifier score | 0.500 |
| Perplexity | 64.691 |