| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can not [be] explained [prep] | 52 |
|
| 2 | can not be explained [prep] | 52 |
|
| 3 | can not be explained [prep] | 52 |
|
| 4 | can not [be] explained by | 29 |
|
| 5 | can not [be] explained in | 17 |
|
