| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a [adj] | 262 |
|
| 2 | have been described [prep] a | 77 |
|
| 3 | have been described [prep] [adj] | 33 |
|
| 4 | been described [prep] a [adj] | 27 |
|
| 5 | have described [prep] a [adj] | 5 |
|
