| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [prep] | 70805 |
|
| 2 | which is [vb pp] | 5563 |
|
| 3 | which is [prep] | 1608 |
|
| 4 | which [vb pp] [prep] | 6 |
|
