| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [noun] [Wh pn] | 448 |
|
| 2 | [prep] a [noun] [noun sg] [Wh pn] | 414 |
|
| 3 | [prep] [art] [noun] officer [Wh pn] | 31 |
|
| 4 | [prep] a [noun] officer [pron] | 21 |
|
| 5 | [prep] a [noun] officer [Wh pn] | 16 |
|
