| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb base] [prep] a | 208 |
|
| 2 | who [vb base] [prep] a | 208 |
|
| 3 | [pron] [vb base] at a | 205 |
|
| 4 | who [vb base] at [art] | 55 |
|
| 5 | who [verb] at a | 44 |
|
| 6 | who [vb base] at a | 11 |
|
