| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [verb] [verb] a [noun] | 1993 |
|
| 2 | [noun pl] [verb] [verb] [art] problem | 49 |
|
| 3 | [noun pl] [verb] [verb] [art] problem | 49 |
|
| 4 | [noun] [verb] [verb] a problem | 35 |
|
| 5 | [noun pl] [verb] [verb] a problem | 6 |
|
