| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh det] happened [prep] be | 5 |
|
| 2 | [Wh det] [adv] happened [prep] be | 6 |
|
| 3 | [Wh det] [adv] happened [prep] be | 6 |
|
| 4 | [Wh det] [noun] happened [prep] be | 6 |
|
