| with ensuring toughness | 12 | other |
| with making sure sturdiness | 3 | cause |
| from 100% natural raw materials | 2 | other |
| mattress → be → generated | 15 |
| mattress → be → derived | 4 |
| negative | neutral | positive |
| 0.026 | 0.459 | 0.514 |
| Raw frequency | 19 |
| Normalized frequency | 0.261 |
| Modifier score | 1.000 |
| Perplexity | 364.534 |