| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] account for [art] [noun sg] | 10 |
|
| 2 | which [modal v] account for [art] [noun sg] | 10 |
|
| 3 | [Wh det] [modal v] account for the [noun sg] | 9 |
|
