| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] known that [noun] | 36 |
|
| 2 | it is known that [noun] | 34 |
|
| 3 | it [is] known that [noun sg] | 14 |
|
| 4 | it [is] known that [noun pl] | 12 |
|
| 5 | it [is] known that [noun prp] | 9 |
|
