| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] established at [noun] | 5 |
|
| 2 | [vb past] [been] established at [noun] | 5 |
|
| 3 | [vb past] [been] established at [noun prp] | 5 |
|
| 4 | [vb past] been established at [noun] | 5 |
|
