| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] happened at the [noun] | 11 |
|
| 2 | [pron] had happened at the [noun] | 11 |
|
| 3 | [Wh det] [vb past] happened at the [noun] | 10 |
|
| 4 | what [vb past] happened at the [noun] | 10 |
|
| 5 | what [vb past] happened at the [noun] | 10 |
|
| 6 | [pron] [vb past] happened at the [noun sg] | 10 |
|
