| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] whether a [noun sg] | 154 |
|
| 2 | issue [prep] a [noun sg] | 129 |
|
| 3 | issue [prep] whether [noun sg] | 12 |
|
| 4 | issue [prep] whether a | 7 |
|
