| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [not/n't] [adv] | 2703 |
|
| 2 | it is [adv] known | 264 |
|
| 3 | it is [not/n't] known | 151 |
|
| 4 | is [not/n't] [adv] known | 111 |
|
