| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | know to have been [verb] [prep] the | 16 |
|
| 2 | known to have [been] [verb] [prep] the | 16 |
|
| 3 | know to have [been] [vb pp] [prep] the | 15 |
|
| 4 | know to have [been] [verb] in the | 5 |
|
