| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have happened at [art] [noun sg] | 20 |
|
| 2 | have happened at the [noun sg] | 16 |
|
| 3 | have happened at the [noun sg] | 16 |
|
| 4 | had happened at [art] [noun sg] | 13 |
|
