| Typicality: | 0.456 |
| Saliency: | 0.180 |
| before 5000 bc | 3 | temporal |
| from the beginning of civilization | 2 | temporal |
| iron → be known to → human | 5 |
| iron → be discovered by → human | 3 |
| negative | neutral | positive |
| 0.074 | 0.744 | 0.182 |
| Raw frequency | 8 |
| Normalized frequency | 0.180 |
| Modifier score | 0.900 |
| Perplexity | 263.947 |