| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who are at [noun] | 37 |
|
| 2 | who are at [noun sg] | 34 |
|
| 3 | who are at risk | 12 |
|
| 4 | who are at risk | 12 |
|
| 5 | who are at present | 8 |
|
| 6 | who are at present | 8 |
|
