| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so as prevent [art] [noun sg] | 6 |
|
| 2 | so as prevent [art] [noun sg] | 6 |
|
| 3 | so as prevent the [noun sg] | 5 |
|
| 4 | so as prevent the [noun sg] | 5 |
|
