| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been cause [prep] a [noun sg] | 29 |
|
| 2 | to have been [prep] a [noun sg] | 13 |
|
| 3 | to have been cause [prep] a | 9 |
|
| 4 | to have been cause [prep] [noun sg] | 5 |
|
