| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] play a vital role | 6 |
|
| 2 | [verb] play a vital role [prep] | 9 |
|
| 3 | [verb] play a vital role in | 9 |
|
| 4 | [verb] play a vital role in | 9 |
|
| 5 | [verb] play a vital role [prep] | 9 |
|
