| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] to | 4804 |
|
| 2 | [pron] contribute to | 338 |
|
| 3 | which contribute [prep] | 145 |
|
| 4 | which contribute [prep] | 145 |
|
| 5 | which contribute to | 135 |
|
