| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] known that [adj] [noun pl] | 9 |
|
| 2 | it be known that [adj] [noun pl] | 9 |
|
| 3 | it [is] known that [adj] [noun pl] | 7 |
|
| 4 | it is known that [adj] [noun pl] | 7 |
|
