| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] had [been] chairman | 6 |
|
| 2 | had [been] [verb] chairman | 5 |
|
| 3 | had [been] chairman [prep] | 9 |
|
| 4 | had [been] chairman [prep] | 9 |
|
| 5 | had [been] chairman of | 6 |
|
| 6 | had [been] chairman of | 6 |
|
