| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | about [pron] happened to | 24 |
|
| 2 | about [pron] happened to | 24 |
|
| 3 | about what happened to | 24 |
|
| 4 | about what happened to | 24 |
|
| 5 | about [Wh det] happened to | 24 |
|
