| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] what happened [prep] the | 12 |
|
| 2 | [vb pp] [prep] what happened [prep] the | 5 |
|
| 3 | [verb] by what happened [prep] the | 5 |
|
| 4 | [verb] [prep] what happened in the | 5 |
|
