| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [prep] [art] | 11350 |
|
| 2 | refer [prep] [art] | 3468 |
|
| 3 | refer [prep] [art] | 3468 |
|
| 4 | refer [prep] [prep] | 2181 |
|
