| to giving the batteries biodegrading properties | 5 | purpose |
| for life | 5 | purpose |
| very | 4 | degree |
| polymer → be → important | 9 |
| polymer → be → essential | 7 |
| polymer → be → the key | 5 |
| negative | neutral | positive |
| 0.026 | 0.538 | 0.436 |
| Raw frequency | 21 |
| Normalized frequency | 0.449 |
| Modifier score | 0.500 |
| Perplexity | 137.034 |