| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb -s] [verb] | 5054 |
|
| 2 | system which [verb] | 683 |
|
| 3 | system which [vb -s] | 354 |
|
| 4 | system [vb -s] [verb] | 325 |
|
