| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [is] a [adj] [noun] | 13581 |
|
| 2 | [noun sg] [is] a [adj] [noun] | 9674 |
|
| 3 | problem [is] [art] [adj] [noun] | 48 |
|
| 4 | problem [is] a [adj] [noun] | 19 |
|
| 5 | problem [be] a [adj] [noun] | 17 |
|
