| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who were [v-ing] at the [noun] | 14 |
|
| 2 | [Wh pn] were [v-ing] at the [noun] | 14 |
|
| 3 | [Wh pn] were [v-ing] at the [noun sg] | 12 |
|
