| Typicality: | 0.496 |
| Saliency: | 0.577 |
| for use as an anesthetic | 11 | purpose |
| in 1970 | 6 | temporal |
| for some medical purposes | 6 | purpose |
| ketamine → be approved for → use | 8 |
| ketamine → be approved by → the fda | 8 |
| ketamine → be → fda-approved | 3 |
| ketamine → be approved in → the us | 3 |
| negative | neutral | positive |
| 0.233 | 0.569 | 0.198 |
| Raw frequency | 22 |
| Normalized frequency | 0.577 |
| Modifier score | 0.500 |
| Perplexity | 52.571 |