| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [prep] a [noun sg] | 1454 |
|
| 2 | [prep] question [prep] [noun sg] | 221 |
|
| 3 | question [prep] a [noun sg] | 181 |
|
| 4 | [prep] question [prep] a | 34 |
|
