| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [pers pn] [is] not known whether | 7 |
|
| 2 | but it [is] not known whether | 7 |
|
| 3 | but [pers pn] is not known whether | 7 |
|
| 4 | but [pers pn] [is] not known whether | 7 |
|
