| for manual control | 3 | purpose |
| manually | 3 | manner |
| according to any specific need | 3 | cause |
| valve → have → handle | 11 |
| valve → look like → handle | 5 |
| valve → be operated by → handle | 5 |
| negative | neutral | positive |
| 0.051 | 0.803 | 0.146 |
| Raw frequency | 21 |
| Normalized frequency | 0.293 |
| Modifier score | 0.450 |
| Perplexity | 170.953 |