| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | concentrated [prep] a few [noun pl] | 8 |
|
| 2 | concentrated in [art] few [noun pl] | 8 |
|
| 3 | concentrated [prep] [art] few [noun pl] | 8 |
|
| 4 | concentrated in [art] few [noun pl] | 8 |
|
