| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | and [Wh det] [vb base] occurred | 5 |
|
| 2 | and [Wh det] have occurred | 5 |
|
| 3 | and which [verb] occurred | 5 |
|
| 4 | and [Wh det] have occurred | 5 |
|
