| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] do not know for certain | 11 |
|
| 2 | [pers pn] do not know for certain | 11 |
|
| 3 | we do not know for certain | 7 |
|
| 4 | we do not know for certain | 7 |
|
