| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [been] taken | 24 |
|
| 2 | who [vb past] been taken | 24 |
|
| 3 | who [vb past] be taken | 24 |
|
| 4 | who had [be] taken | 21 |
|
