| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has be referred to [adv] | 12 |
|
| 2 | has been referred [prep] [adv] | 12 |
|
| 3 | has be referred [prep] [adv] | 12 |
|
| 4 | has be referred to [adv] | 12 |
|
