| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's not known [conj] | 7 |
|
| 2 | it 's [not/n't] known [subord] | 6 |
|
| 3 | it 's [not/n't] known if | 5 |
|
| 4 | it 's [not/n't] known if | 5 |
|
