| for all these processes | 5 | purpose |
| in glassmaking | 3 | location |
| in japan | 2 | location |
| charcoal → be → fuel | 8 |
| charcoal → be used as → fuel | 5 |
| charcoal → be required as → fuel | 3 |
| charcoal → be → the fuel | 3 |
| negative | neutral | positive |
| 0.360 | 0.587 | 0.053 |
| Raw frequency | 19 |
| Normalized frequency | 0.627 |
| Modifier score | 0.500 |
| Perplexity | 72.258 |