| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been [vb pp] chairman of | 8 |
|
| 2 | [noun prp] have been [vb pp] chairman of | 7 |
|
| 3 | have been [vb pp] chairman of [art] | 17 |
|
| 4 | have been [vb pp] chairman of [art] | 17 |
|
| 5 | have been [vb pp] chairman of the | 16 |
|
| 6 | have been [vb pp] chairman of the | 16 |
|
