| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] on [num] april 1992 | 8 |
|
| 2 | be [vb pp] on [num] april 1992 | 8 |
|
| 3 | be held on [num] april 1992 | 7 |
|
| 4 | be [vb pp] on [num] april 1992 | 7 |
|
