| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a referendum be hold [prep] | 8 |
|
| 2 | a referendum [be] hold [prep] | 8 |
|
| 3 | a referendum [be] held [prep] | 8 |
|
| 4 | a referendum [be] hold on | 5 |
|
