| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who work at the | 48 |
|
| 2 | [Wh pn] worked at the | 26 |
|
| 3 | [Wh pn] works at the | 15 |
|
| 4 | [Wh pn] work at the | 7 |
|
