| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be mainly because [prep] [art] | 9 |
|
| 2 | be mainly because of [art] | 8 |
|
| 3 | be mainly because of [art] | 8 |
|
| 4 | be mainly because [prep] the | 5 |
|
