| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] [adv] | 6011 |
|
| 2 | it is [adv] known | 415 |
|
| 3 | it is [adv] known | 264 |
|
| 4 | is [adv] [adv] known | 252 |
|
