| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] just happened to | 6 |
|
| 2 | [Wh pn] just happened [prep] | 6 |
|
| 3 | who just happened [prep] | 6 |
|
| 4 | [Wh pn] just happened to | 6 |
|
