| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when [art] [adj] [noun sg] | 1399 |
|
| 2 | 1989 [art] [adj] [noun sg] | 81 |
|
| 3 | 1989 when [art] [noun sg] | 17 |
|
| 4 | 1989 when [art] [adj] | 13 |
|
