| for biasing the substrate | 5 | purpose |
| structure → have → surface | 10 |
| structure → be → surface | 3 |
| structure → have → at least one surface | 3 |
| negative | neutral | positive |
| 0.047 | 0.856 | 0.097 |
| Raw frequency | 16 |
| Normalized frequency | 0.254 |
| Modifier score | 0.500 |
| Perplexity | 346.102 |