| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [vb pp] from [noun] | 18 |
|
| 2 | it have been [vb pp] from [noun prp] | 11 |
|
| 3 | it had been [vb pp] from [noun] | 10 |
|
| 4 | it has been [vb pp] from [noun] | 7 |
|
| 5 | it have been recorded from [noun] | 5 |
|
| 6 | it have been [vb pp] from [noun sg] | 5 |
|
