| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] known that [noun] | 36 |
|
| 2 | it [is] known that [adj] | 32 |
|
| 3 | [is] known that [adj] [noun] | 20 |
|
| 4 | it [is] that [adj] [noun] | 18 |
|
