| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] problem [was/were] | 418 |
|
| 2 | problem [was/were] [art] | 89 |
|
| 3 | [art] problem [art] | 48 |
|
| 4 | [art] [was/were] [art] | 31 |
|
