| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back to [art] last century | 5 |
|
| 2 | [verb] back [prep] the last century | 5 |
|
| 3 | [verb] back [prep] [art] last century | 5 |
|
| 4 | [verb] back to [art] last century | 5 |
|
