| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which [modal v] [vb infin] [noun sg] | 626 |
|
| 2 | problem which [modal v] [vb infin] [noun] | 10 |
|
| 3 | problem [pron] [modal v] [vb infin] [noun sg] | 8 |
|
| 4 | problem which [modal v] [verb] [noun sg] | 7 |
|
