| Typicality: | 0.412 |
| Saliency: | 0.290 |
| through earth science | 4 | other |
| topic → be related to → american history | 8 |
| topic → include → american history | 6 |
| topic → include → u.s. history | 4 |
| topic → relate to → american history | 4 |
| topic → be → american history | 3 |
| negative | neutral | positive |
| 0.038 | 0.814 | 0.148 |
| Raw frequency | 25 |
| Normalized frequency | 0.290 |
| Modifier score | 0.620 |
| Perplexity | 78.656 |