| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] of [art] | 271 |
|
| 2 | [vb pp] chairman of [art] | 78 |
|
| 3 | been [vb pp] chairman of | 22 |
|
| 4 | been chairman of [art] | 17 |
|
