| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] problem which can be [vb pp] | 5 |
|
| 2 | problem which can [adv] be [vb pp] | 6 |
|
| 3 | problem which can be [vb pp] [prep] | 8 |
|
| 4 | problem which can be [vb pp] [prep] | 8 |
|
