| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [n mass] who have been | 327 |
|
| 2 | who have been [noun] | 192 |
|
| 3 | [n mass] who have [noun] | 81 |
|
| 4 | [n mass] have been [noun] | 9 |
|
