| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] [det] [noun] | 37413 |
|
| 2 | back [prep] [art] [noun] | 12678 |
|
| 3 | back [prep] [det] [noun] | 618 |
|
| 4 | back [prep] [art] [det] | 115 |
|
| 5 | back [art] [det] [noun] | 72 |
|
