| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] [art] | 90045 |
|
| 2 | [verb] [art] problem | 4937 |
|
| 3 | [vb pp] [art] problem | 494 |
|
| 4 | [verb] [vb pp] problem | 156 |
|
