| in short supply | 7 | other |
| because of their historic relevance | 3 | cause |
| bronze → be → valuable | 3 |
| bronze → be of → high value | 3 |
| bronze → be → valuable material | 3 |
| negative | neutral | positive |
| 0.268 | 0.370 | 0.362 |
| Raw frequency | 9 |
| Normalized frequency | 0.313 |
| Modifier score | 0.500 |
| Perplexity | 89.900 |