| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] [verb] at [art] | 877 |
|
| 2 | [prep] [noun] [verb] at [art] | 877 |
|
| 3 | [prep] [noun] [verb] [prep] an | 662 |
|
| 4 | [prep] [noun] [verb] at a | 196 |
|
| 5 | [prep] [noun] [verb] at an | 26 |
|
