| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | some of [art] problem | 199 |
|
| 2 | some of [art] problem | 199 |
|
| 3 | some [prep] the problem | 199 |
|
| 4 | some [prep] [art] problem | 199 |
|
| 5 | some [prep] [art] problems | 197 |
|
