| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb past] at [noun] | 182 |
|
| 2 | [vb past] [been] at [noun] | 166 |
|
| 3 | who [vb past] [been] [noun] | 141 |
|
| 4 | who [vb past] [been] at | 47 |
|
