| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known that [noun] | 38 |
|
| 2 | it is [adv] known [that] [noun] | 38 |
|
| 3 | it is [adv] known that [noun] | 38 |
|
| 4 | it is well known [conj] [noun] | 32 |
|
| 5 | it is [adv] known [conj] [noun pl] | 18 |
|
| 6 | it is [adv] known [conj] [noun sg] | 13 |
|
| 7 | it is [adv] known [conj] [noun prp] | 7 |
|
