| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] [vb pp] [prep] [art] | 843 |
|
| 2 | system which [verb] [prep] [art] | 28 |
|
| 3 | system [verb] [vb pp] [prep] [art] | 21 |
|
| 4 | system which [verb] [vb pp] [prep] | 15 |
|
| 5 | system which [verb] [vb pp] [art] | 6 |
|
