| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [det] [prep] [det] | 3293 |
|
| 2 | [verb] [prep] [det] problems | 131 |
|
| 3 | [det] [prep] [det] problems | 90 |
|
| 4 | [verb] [det] [det] problems | 29 |
|
