| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known that | 147 |
|
| 2 | it is [adv] [adv] that | 64 |
|
| 3 | it is [adv] [adv] known | 30 |
|
| 4 | is [adv] [adv] known that | 12 |
|
