| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem of [Wh adv] [art] [adj] | 9 |
|
| 2 | problem of [adv] [art] [adj] | 9 |
|
| 3 | problem of how [art] [adj] | 6 |
|
| 4 | problem of how [art] [adj] | 6 |
|
| 5 | problem of [adv] the [adj] | 5 |
|
| 6 | problem of [adv] the [adj] | 5 |
|
