| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem [is] [adj -er] [subord] | 6 |
|
| 2 | problem is [adj -er] [conj] | 5 |
|
| 3 | problem [is] [adj -er] than | 5 |
|
| 4 | problem [is] [adj -er] than | 5 |
|
