| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [is] [vb pp] [is] [that] | 25 |
|
| 2 | what is [vb pp] [be] [that] | 25 |
|
| 3 | what [is] [vb pp] is [that] | 25 |
|
| 4 | what [is] [vb pp] [be] that | 25 |
|
| 5 | what [is] [vb pp] be [that] | 25 |
|
| 6 | what [is] known [be] [that] | 10 |
|
| 7 | what [is] required [be] [that] | 5 |
|
