| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] [prep] a | 658 |
|
| 2 | who [vb past] [prep] [num] | 438 |
|
| 3 | [vb past] [prep] a [num] | 305 |
|
| 4 | who [vb past] a [num] | 59 |
|
