| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb past] been established [prep] [noun] | 7 |
|
| 2 | which [vb past] [been] established [prep] [noun] | 7 |
|
| 3 | [Wh det] [vb past] [been] established [prep] [noun prp] | 7 |
|
| 4 | [Wh det] [vb past] [been] established [prep] [noun] | 7 |
|
| 5 | [Wh det] had [been] established [prep] [noun] | 7 |
|
