| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who had [been] [prep] | 319 |
|
| 2 | had [been] [prep] [det] | 171 |
|
| 3 | who had [prep] [det] | 19 |
|
| 4 | who had [been] [det] | 5 |
|
