| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [pers pn] [prep] | 1002 |
|
| 2 | [pron] [vb past] [pers pn] at | 637 |
|
| 3 | who [vb past] [pron] at | 51 |
|
| 4 | who [verb] [pers pn] at | 47 |
|
