| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been operate in | 6 |
|
| 2 | [pron] have been operate in | 5 |
|
| 3 | have been operate in [noun] | 9 |
|
| 4 | have been operate in [noun prp] | 8 |
|
| 5 | have been operate in [art] | 5 |
|
| 6 | have been operate in [art] | 5 |
|
