| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which were [vb pp] [prep] an | 12 |
|
| 2 | which were [verb] [prep] an | 12 |
|
| 3 | which were [verb] in an | 6 |
|
| 4 | which were [verb] in an | 6 |
|
