| Typicality: | 0.397 |
| Saliency: | 0.344 |
| on april | 9 | temporal |
| according to faa records | 7 | other |
| in 1953 | 3 | temporal |
| airplane → be issued → an airworthiness certificate | 9 |
| airplane → be issued → standard airworthiness certificate | 4 |
| airplane → be issued → special airworthiness certificate | 3 |
| negative | neutral | positive |
| 0.026 | 0.906 | 0.068 |
| Raw frequency | 16 |
| Normalized frequency | 0.344 |
| Modifier score | 0.500 |
| Perplexity | 34.285 |