| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problems that [vb mod] [verb] | 76 |
|
| 2 | [prep] problems that [verb] | 21 |
|
| 3 | [prep] problems that [vb mod] | 11 |
|
| 4 | [prep] problems [vb mod] [verb] | 9 |
|
