| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun] [noun sg] [prep] a | 621 |
|
| 2 | problem of [noun] [noun sg] [prep] | 59 |
|
| 3 | problem of [noun] [prep] a | 20 |
|
| 4 | problem of [noun sg] [prep] a | 16 |
|
