| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | concerned ensure that the [noun sg] | 5 |
|
| 2 | concerned to ensure that [art] [noun sg] | 5 |
|
| 3 | concerned ensure that the [noun sg] | 5 |
|
| 4 | concerned ensure that [art] [noun sg] | 5 |
|
