| by separating the different materials | 4 | manner |
| prior to metallurgical processing | 2 | temporal |
| lead → be → recovered | 11 |
| lead → be → retrieved | 4 |
| negative | neutral | positive |
| 0.134 | 0.694 | 0.172 |
| Raw frequency | 15 |
| Normalized frequency | 0.242 |
| Modifier score | 0.700 |
| Perplexity | 74.969 |