| by said bio-active agent | 2 | other |
| membrane → be made of → paper | 4 |
| membrane → be → material | 4 |
| membrane → comprise → material | 4 |
| negative | neutral | positive |
| 0.088 | 0.861 | 0.050 |
| Raw frequency | 12 |
| Normalized frequency | 0.262 |
| Modifier score | 0.500 |
| Perplexity | 375.880 |