| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known [conj] | 149 |
|
| 2 | it is [not/n't] [adv] [conj] | 127 |
|
| 3 | it is [not/n't] known [conj] | 79 |
|
| 4 | it is [not/n't] [adv] known | 40 |
|
| 5 | is [not/n't] [adv] known [conj] | 25 |
|
