| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system which [verb] the [adj] [noun pl] | 7 |
|
| 2 | system [Wh det] [verb] the [adj] [noun pl] | 6 |
|
| 3 | system [Wh det] [verb] the [adj] [noun pl] | 6 |
|
