| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can only [be] explained [prep] | 14 |
|
| 2 | can only be explained [prep] | 14 |
|
| 3 | can only be explained [prep] | 14 |
|
| 4 | can only [be] explained in | 6 |
|
