| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it 's [adv] known that | 10 |
|
| 2 | it 's [adv] known [that] | 10 |
|
| 3 | it 's [adv] known that | 10 |
|
| 4 | it 's well known [conj] | 5 |
|
