| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | believe to have been [verb] [prep] | 83 |
|
| 2 | [verb] to have been cause [prep] | 25 |
|
| 3 | believe [verb] been cause [prep] | 7 |
|
| 4 | believe have been cause [prep] | 7 |
|
| 5 | believe to have [been] cause [prep] | 6 |
|
| 6 | believe to have be cause [prep] | 6 |
|
| 7 | believe [to-vb] been cause [prep] | 6 |
|
| 8 | believe to have [be] cause [prep] | 6 |
|
