| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] played a [adj] role | 10 |
|
| 2 | [Wh det] have played a [adj] role | 10 |
|
| 3 | [Wh det] [vb past] played a [adj] role | 7 |
|
| 4 | [Wh det] had played a [adj] role | 7 |
|
