| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what happened [prep] [adj] | 154 |
|
| 2 | what [adv] happened [prep] | 40 |
|
| 3 | [adv] happened [prep] [adj] | 23 |
|
| 4 | what [adv] [prep] [adj] | 6 |
|
