| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | challenge to [noun pl] ' [noun] | 6 |
|
| 2 | challenge to [noun pl] ' decisions | 5 |
|
| 3 | challenge to [noun pl] ' decision | 5 |
|
| 4 | challenge to [noun pl] ' [noun pl] | 5 |
|
