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