| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was set up in 1991 | 6 |
|
| 2 | [be] set up in 1991 | 6 |
|
| 3 | [was/were] set up in 1991 | 6 |
|
| 4 | be set up in 1991 | 6 |
|
| 5 | set up in [noun] 1991 | 7 |
|
| 6 | set up in [noun prp] 1991 | 7 |
|
