| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | carried out at the [noun sg] [prep] | 18 |
|
| 2 | carried out at the [noun] [prep] | 18 |
|
| 3 | carried out at the [noun] [prep] | 18 |
|
| 4 | carried out at the [noun] of | 14 |
|
| 5 | carried out at the [noun] of | 14 |
|
