| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] played a [adj] role | 10 |
|
| 2 | which [verb] played a [adj] role | 10 |
|
| 3 | which have played a [adj] role | 10 |
|
| 4 | which had played a [adj] role | 7 |
|
| 5 | which [vb past] played a [adj] role | 7 |
|
