| to the invention of polyurethane | 2 | other |
| usually | 2 | degree |
| balloon → be made of → rubber | 15 |
| balloon → be made from → rubber | 4 |
| balloon → be → rubber | 3 |
| negative | neutral | positive |
| 0.098 | 0.746 | 0.156 |
| Raw frequency | 22 |
| Normalized frequency | 0.317 |
| Modifier score | 0.850 |
| Perplexity | 57.221 |