| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] [pron] [prep] | 1532 |
|
| 2 | system which [verb] [prep] | 61 |
|
| 3 | system which [verb] [pron] | 44 |
|
| 4 | system [verb] [pron] [prep] | 25 |
|
