| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] we do n't know | 22 |
|
| 2 | [Wh det] we do n't know | 16 |
|
| 3 | what we do n't know | 15 |
|
| 4 | which we do n't know | 7 |
|
| 5 | [Wh det] we did n't know | 6 |
|
