| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be explained by the [noun sg] | 63 |
|
| 2 | [modal v] be explained by the | 61 |
|
| 3 | [modal v] be explained by [noun sg] | 19 |
|
| 4 | [modal v] be by the [noun sg] | 17 |
|
