| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [noun] [unc] | 1047 |
|
| 2 | [prep] [art] officer [unc] | 113 |
|
| 3 | [prep] [art] officer [unc] | 113 |
|
| 4 | [prep] a officer [unc] | 23 |
|
