| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] known that [adj] | 31 |
|
| 2 | it is well known that [adj] | 20 |
|
| 3 | it is [adv] known that [det] | 16 |
|
| 4 | it is [adv] known that [adj] | 12 |
|
| 5 | it is [adv] known that many | 6 |
|
| 6 | it is now known that [adj] | 6 |
|
| 7 | it is [adv] known that many | 6 |
|
