| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] been identified | 33 |
|
| 2 | which have been identified | 33 |
|
| 3 | which [vb base] been identified | 18 |
|
| 4 | which have been identified | 18 |
|
| 5 | which [vb -s] been identified | 11 |
|
| 6 | which has been identified | 11 |
|
