| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] had [been] [vb pp] at | 51 |
|
| 2 | [Wh det] [vb past] [been] [vb pp] at | 51 |
|
| 3 | [Wh det] [vb past] been [vb pp] at | 51 |
|
| 4 | which [vb past] [been] [vb pp] at | 48 |
|
| 5 | [Wh det] [vb past] [been] established at | 5 |
|
