| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] [been] [vb pp] | 1857 |
|
| 2 | [vb past] [been] [vb pp] at | 568 |
|
| 3 | which [vb past] [vb pp] at | 42 |
|
| 4 | which [vb past] [been] at | 8 |
|
