| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known [that] [noun pl] | 18 |
|
| 2 | it is [adv] known that [noun pl] | 18 |
|
| 3 | it is [adv] known that [noun pl] | 18 |
|
| 4 | it is well known [conj] [noun pl] | 16 |
|
