| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] to play a central role [prep] | 5 |
|
| 2 | [verb] to play a central role [prep] | 5 |
|
| 3 | to play a central role [prep] the | 6 |
|
| 4 | to play a central role [prep] the | 6 |
|
| 5 | to play a central role [prep] [art] | 6 |
|
| 6 | to play a central role [prep] [art] | 6 |
|
