| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have play a central role in | 8 |
|
| 2 | [verb] played a central role in | 8 |
|
| 3 | [vb pp] play a central role in | 5 |
|
| 4 | [verb] to play a central role in | 5 |
|
