| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [art] [noun sg] | 4437 |
|
| 2 | 1989 [art] [noun sg] | 192 |
|
| 3 | 1989 when [art] | 34 |
|
| 4 | 1989 when [noun sg] | 5 |
|
