| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [am/are] to be | 15 |
|
| 2 | [Wh det] [am/are] known to be | 12 |
|
| 3 | [prep] [Wh det] [am/are] known to | 5 |
|
