| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] [conj] [art] [noun] [prep] | 738 |
|
| 2 | problem [be] [conj] [art] [noun] [prep] | 38 |
|
| 3 | problem [is] [conj] [art] [noun] [prep] | 30 |
|
