| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it is not known [adv] | 8 |
|
| 2 | [conj] it is not known [adv] | 8 |
|
| 3 | [conj] it is [not/n't] known [adv] | 8 |
|
| 4 | [conj] it is [adv] known how | 7 |
|
| 5 | [conj] it is [adv] known [Wh adv] | 7 |
|
| 6 | [conj] it is [adv] known how | 7 |
|
| 7 | [coord] it is [adv] known [adv] | 5 |
|
