| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have happened at [art] [adj] [noun sg] | 11 |
|
| 2 | [verb] happened at [art] [adj] [noun sg] | 11 |
|
| 3 | [vb past] happened at [art] [adj] [noun sg] | 5 |
|
| 4 | had happened at [art] [adj] [noun sg] | 5 |
|
