| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is [not/n't] [adv] known | 7 |
|
| 2 | [conj] it is not [adv] known | 6 |
|
| 3 | [conj] it is [not/n't] yet known | 5 |
|
| 4 | [conj] it is [not/n't] yet known | 5 |
|
