| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] prevent [pron] [prep] [verb] [pron] | 15 |
|
| 2 | which [verb] [pron] [prep] [verb] [pron] | 13 |
|
| 3 | which prevent [pron] [prep] [verb] [pron] | 8 |
|
