| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in [noun prp] 1989 it [was/were] | 10 |
|
| 2 | in [noun] 1989 it [was/were] | 10 |
|
| 3 | in 1989 it [was/were] [vb pp] | 6 |
|
| 4 | in 1989 it [was/were] [verb] | 6 |
|
