| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] it is [not/n't] known [conj] | 15 |
|
| 2 | [coord] it is [not/n't] known [subord] | 15 |
|
| 3 | [coord] it is [not/n't] known whether | 11 |
|
| 4 | [coord] it is [not/n't] known whether | 11 |
|
| 5 | [coord] it is [not/n't] known [adv] | 5 |
|
| 6 | [coord] it is [not/n't] known how | 5 |
|
| 7 | [coord] it is [not/n't] known how | 5 |
|
| 8 | [coord] it is [not/n't] known [Wh adv] | 5 |
|
