| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [modal v] [verb] for [det] | 18 |
|
| 2 | which [modal v] account for [adj] | 8 |
|
| 3 | [pron] [modal v] account for [det] | 8 |
|
| 4 | which [modal v] account [prep] [det] | 5 |
|
