| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | 1989 when [art] [noun sg] [verb] | 5 |
|
| 2 | 1989 when the [noun sg] [verb] | 5 |
|
| 3 | 1989 when [art] [noun sg] [vb past] | 5 |
|
| 4 | 1989 when [art] [noun sg] [verb] | 5 |
|
| 5 | 1989 when the [noun sg] [verb] | 5 |
|
