| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] discussed [prep] | 45 |
|
| 2 | [Wh det] [vb base] [been] [prep] | 31 |
|
| 3 | [Wh det] [vb base] [been] discussed | 14 |
|
