| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | known to have been [prep] | 7 |
|
| 2 | known [to-vb] been in | 7 |
|
| 3 | known [to-vb] been in | 7 |
|
| 4 | known [to-vb] been [prep] | 7 |
|
