| Typicality: | 0.333 |
| Saliency: | 0.347 |
| in 1977 | 22 | temporal |
| in 1994 | 4 | temporal |
| in part | 4 | other |
| park → be designated → a national historic landmark | 14 |
| park → designate → a national historic landmark | 8 |
| park → be declared → a national historic landmark | 7 |
| park → be designated as → a national historic landmark | 7 |
| park → be declared → national historic landmark district | 5 |
| park → be recognized as → a national historic landmark | 3 |
| negative | neutral | positive |
| 0.005 | 0.564 | 0.431 |
| Raw frequency | 44 |
| Normalized frequency | 0.347 |
| Modifier score | 0.300 |
| Perplexity | 15.363 |