| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] announced at a | 17 |
|
| 2 | be announced at a | 17 |
|
| 3 | [was/were] announced at a | 9 |
|
| 4 | [be] announced at a | 8 |
|
| 5 | be announced at a | 8 |
|
| 6 | was announced at a | 6 |
|
| 7 | announced at a [noun] | 21 |
|
| 8 | announced at a [noun sg] | 18 |
|
| 9 | announced at a press | 9 |
|
| 10 | announced at a press | 9 |
|
