| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] when the | 791 |
|
| 2 | 1989 when [art] | 34 |
|
| 3 | 1989 [adv] the | 29 |
|
| 4 | 1989 [Wh adv] the | 27 |
|
| 5 | 1989 when the | 27 |
|
