| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [adv] happened at | 5 |
|
| 2 | [pron] [adv] happened at | 5 |
|
| 3 | [Wh det] [adv] happened at | 5 |
|
| 4 | what [adv] happened at | 5 |
|
| 5 | [adv] happened at [noun] | 5 |
|
