| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] about by a | 56 |
|
| 2 | [verb] about by a | 51 |
|
| 3 | brought about by a | 51 |
|
| 4 | bring about by a | 51 |
|
| 5 | [verb] about by an | 12 |
|
