| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [vb past] [been] [det] discussion | 6 |
|
| 2 | [ex0] [vb past] been [det] discussion | 6 |
|
| 3 | [ex0] had [been] [det] discussion | 6 |
|
| 4 | [ex0] [vb past] [been] [det] discussion | 6 |
|
