| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a [adj] | 262 |
|
| 2 | have been identified [prep] a | 35 |
|
| 3 | have been identified [prep] [adj] | 20 |
|
| 4 | been identified [prep] a [adj] | 20 |
|
