| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it happen [prep] a [adj] [noun] | 11 |
|
| 2 | it happen [prep] a [adj] [noun] | 11 |
|
| 3 | it happen in a [adj] [noun] | 7 |
|
| 4 | it happen in a [adj] [noun] | 7 |
|
