| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [vb pp] a key role in | 5 |
|
| 2 | has [vb pp] a key role [prep] | 5 |
|
| 3 | has [vb pp] a key role [prep] | 5 |
|
| 4 | has [vb pp] a key role in | 5 |
|
