| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what happened at the | 8 |
|
| 2 | [prep] what happened at the | 8 |
|
| 3 | [verb] what happened at the | 6 |
|
| 4 | what happened at the [noun] | 20 |
|
| 5 | what happened at the [noun sg] | 16 |
|
