| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be back [prep] the [noun sg] | 130 |
|
| 2 | be traced back [prep] the | 43 |
|
| 3 | be traced [prep] the [noun sg] | 29 |
|
| 4 | traced back [prep] the [noun sg] | 18 |
|
