| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] [been] at the [noun sg] | 5 |
|
| 2 | [Wh det] [vb past] been at the [noun sg] | 5 |
|
| 3 | [Wh det] had [been] at the [noun sg] | 5 |
|
