| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is a [adj] [noun] | 29071 |
|
| 2 | problem is [adj] [noun] | 62 |
|
| 3 | problem is a [adj] | 24 |
|
| 4 | problem is a [noun] | 22 |
|
| 5 | problem a [adj] [noun] | 14 |
|
