| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to have been cause by a | 11 |
|
| 2 | [vb pp] to have been cause by a | 9 |
|
| 3 | to have been cause by a [noun sg] | 8 |
|
| 4 | to have been cause by a [noun] | 8 |
|
