| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be a [noun sg] | 6816 |
|
| 2 | happened [prep] a [noun sg] | 69 |
|
| 3 | happened [prep] be a | 39 |
|
| 4 | happened [prep] be [noun sg] | 5 |
|
