| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | seem to be due to | 9 |
|
| 2 | seem to [be] due to | 9 |
|
| 3 | seem to [be] due to | 9 |
|
| 4 | seem to be due to | 9 |
|
| 5 | seems to [be] due to | 7 |
|
