| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | discussion of the role of [noun] | 7 |
|
| 2 | discussion of the role [prep] [noun] | 7 |
|
| 3 | discussion of the role [prep] [noun] | 7 |
|
| 4 | discussion of the role of [noun] | 7 |
|
| 5 | discussion of the role [prep] [noun] | 7 |
|
