| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] problem [is] [conj] | 327 |
|
| 2 | [art] problem [conj] [pron] | 299 |
|
| 3 | problem [is] [conj] [pron] | 185 |
|
| 4 | [art] problem [is] [pron] | 59 |
|
