| Typicality: | 0.320 |
| Saliency: | 0.369 |
| viagra → be launched in → 1998 | 5 |
| viagra → be introduced in → 1998 | 4 |
| viagra → be approved in → 1998 | 3 |
| negative | neutral | positive |
| 0.138 | 0.420 | 0.442 |
| Raw frequency | 12 |
| Normalized frequency | 0.369 |
| Modifier score | 0.500 |
| Perplexity | 115.245 |