| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [prep] [noun] at | 1233 |
|
| 2 | concerned [prep] [noun] [prep] | 309 |
|
| 3 | concerned [prep] [noun] [prep] | 309 |
|
| 4 | concerned [prep] [noun] at | 10 |
|
