| Typicality: | 0.775 |
| Saliency: | 1.000 |
| at high latitudes | 8 | location |
| as far south as iowa | 7 | location |
| till late april | 6 | temporal |
| aurora borealis → be → visible | 35 |
| aurora borealis → be → viewed | 3 |
| aurora borealis → be → beautiful | 3 |
| negative | neutral | positive |
| 0.040 | 0.597 | 0.363 |
| Raw frequency | 41 |
| Normalized frequency | 1.000 |
| Modifier score | 0.800 |
| Perplexity | 35.938 |