| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has been [vb pp] chairman of | 6 |
|
| 2 | [noun prp] has been [vb pp] chairman of | 5 |
|
| 3 | has been [vb pp] chairman of [art] | 15 |
|
| 4 | has been [vb pp] chairman of [art] | 15 |
|
| 5 | has been [vb pp] chairman of the | 14 |
|
| 6 | has been [vb pp] chairman of the | 14 |
|
