| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] once been [noun] [noun prp] | 5 |
|
| 2 | [verb] once been [noun] [noun prp] | 5 |
|
| 3 | have once been [noun] [noun prp] | 5 |
|
| 4 | had once been [noun] [noun prp] | 5 |
|
