| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] back to the | 30 |
|
| 2 | have been [vb pp] back to the | 28 |
|
| 3 | have [be] traced back to the | 5 |
|
| 4 | have been traced [adv] to the | 5 |
|
| 5 | have been traced back to [art] | 5 |
|
| 6 | have been traced back to the | 5 |
|
| 7 | have been traced [adv prt] to the | 5 |
|
| 8 | have be traced back to the | 5 |
|
| 9 | have [been] traced back to the | 5 |
|
| 10 | have been traced back [prep] the | 5 |
|
| 11 | have been traced back to the | 5 |
|
| 12 | have been trace back to the | 5 |
|
| 13 | have been traced back [prep] the | 5 |
|
| 14 | [verb] been traced back to the | 5 |
|
