| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adv] known that | 147 |
|
| 2 | is [not/n't] [adv] that | 128 |
|
| 3 | is [not/n't] [adv] known | 111 |
|
| 4 | [not/n't] [adv] known that | 9 |
|
