| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is not known [subord] | 15 |
|
| 2 | but it is not known [conj] | 11 |
|
| 3 | [coord] it is not known whether | 11 |
|
| 4 | [coord] it is not known whether | 11 |
|
