| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [verb] a | 6853 |
|
| 2 | upon [Wh det] [verb] | 123 |
|
| 3 | upon [verb] a | 63 |
|
| 4 | upon [Wh det] a | 38 |
|
