| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | refer [prep] at [art] [noun sg] [prep] | 8 |
|
| 2 | refer [prep] at [art] [noun sg] of | 8 |
|
| 3 | refer [prep] at [art] [noun sg] of | 8 |
|
| 4 | refer [prep] at [art] [noun sg] [prep] | 8 |
|
