| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] that [pron] | 310 |
|
| 2 | it [is] known that | 153 |
|
| 3 | [is] known that [pron] | 28 |
|
| 4 | it known that [pron] | 18 |
|
| 5 | it [is] known [pron] | 6 |
|
