| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be operating [prep] [adj] [noun pl] | 23 |
|
| 2 | be operating [prep] [adj] [noun pl] | 23 |
|
| 3 | be operating for [adj] [noun pl] | 7 |
|
| 4 | be operating for [adj] [noun pl] | 7 |
|
