| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] happened [prep] the | 124 |
|
| 2 | [adv] [Wh det] [vb -s] happened [prep] | 40 |
|
| 3 | [adv] [Wh det] [vb -s] [prep] the | 40 |
|
