| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] have played a [adj] role | 17 |
|
| 2 | [noun prp] [verb] played a [adj] role | 17 |
|
| 3 | [noun prp] had played a [adj] role | 10 |
|
| 4 | [noun prp] [vb past] played a [adj] role | 10 |
|
