| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [det] | 1505 |
|
| 2 | [vb past] at [det] | 1237 |
|
| 3 | who [vb past] at | 602 |
|
| 4 | who at [det] | 55 |
|
