| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known [conj] | 149 |
|
| 2 | it is not [adv] [conj] | 109 |
|
| 3 | it is not known [conj] | 78 |
|
| 4 | it is not [adv] known | 37 |
|
| 5 | is not [adv] known [conj] | 24 |
|
