| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | concerned with the problems [prep] | 7 |
|
| 2 | concerned with [art] problems [prep] | 7 |
|
| 3 | concerned with [art] problems [prep] | 7 |
|
| 4 | concerned with the problems [prep] | 7 |
|
