| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [unc] | 422 |
|
| 2 | by [art] [unc] | 374 |
|
| 3 | by [art] [unc] | 374 |
|
| 4 | by a [unc] | 66 |
|
