| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] operate [prep] a [adj] | 12 |
|
| 2 | which operate [prep] a [adj] | 12 |
|
| 3 | [Wh det] operates [prep] a [adj] | 7 |
|
| 4 | [Wh det] operate in a [adj] | 6 |
|
| 5 | [Wh det] operate in a [adj] | 6 |
|
| 6 | [Wh det] operate [prep] a [adj] | 5 |
|
