| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been shown [prep] [adj] | 33 |
|
| 2 | been shown in [adj] | 18 |
|
| 3 | been shown in [adj] | 18 |
|
| 4 | been shown by [adj] | 8 |
|
| 5 | been shown by [adj] | 8 |
|
