| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh adv] [pers pn] | 5571 |
|
| 2 | [prep] 1989 [pers pn] | 87 |
|
| 3 | [prep] 1989 [Wh adv] | 53 |
|
| 4 | 1989 [Wh adv] [pers pn] | 24 |
|
