| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] to ensure that [adj] [noun pl] | 12 |
|
| 2 | [adj] ensure that [adj] [noun pl] | 11 |
|
| 3 | necessary ensure that [adj] [noun pl] | 5 |
|
| 4 | necessary ensure that [adj] [noun pl] | 5 |
|
