| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who is [verb] at [noun prp] [noun] | 7 |
|
| 2 | who is [verb] at [noun prp] [noun] | 7 |
|
| 3 | who is [verb] at [noun prp] [noun sg] | 5 |
|
| 4 | who is [vb pp] at [noun prp] [noun] | 5 |
|
