| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] carried out at [art] | 16 |
|
| 2 | was carried [adv prt] at [art] | 14 |
|
| 3 | [was/were] carried [adv prt] at the | 9 |
|
| 4 | [was/were] carried [adv prt] at a | 8 |
|
