| Typicality: | 0.421 |
| Saliency: | 0.401 |
| originally | 2 | other |
| as a milder alternative to phencyclidine | 2 | purpose |
| ketamine → be synthesized in → 1962 | 7 |
| ketamine → be developed in → 1962 | 5 |
| negative | neutral | positive |
| 0.059 | 0.871 | 0.070 |
| Raw frequency | 12 |
| Normalized frequency | 0.401 |
| Modifier score | 0.500 |
| Perplexity | 30.840 |