| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] have called for | 12 |
|
| 2 | who [verb] called for | 12 |
|
| 3 | [Wh pn] [vb past] called for | 8 |
|
| 4 | [Wh pn] had called for | 8 |
|
