| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [to-vb] [adj] [noun] | 1520 |
|
| 2 | problem [is] [adj] [noun] | 56 |
|
| 3 | problem [is] [to-vb] [adj] | 26 |
|
| 4 | problem [is] [to-vb] [noun] | 15 |
|
