| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] have been [vb pp] head of | 6 |
|
| 2 | [noun prp] have been [verb] head of | 6 |
|
| 3 | [noun prp] have been appoint head of | 5 |
|
| 4 | [noun prp] have been appointed head of | 5 |
|
