| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] [vb pp] a | 565 |
|
| 2 | group [verb] [vb pp] a | 87 |
|
| 3 | group which [verb] [vb pp] | 62 |
|
| 4 | group which [verb] a | 25 |
|
