| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] [art] [noun] | 12678 |
|
| 2 | [adv] [prep] [art] [noun prp] | 10075 |
|
| 3 | back [prep] [art] [noun prp] | 653 |
|
| 4 | back [prep] [art] [noun prp] | 653 |
|
