| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which has [vb pp] to the | 36 |
|
| 2 | which has lead to the | 18 |
|
| 3 | which has led to the | 17 |
|
| 4 | which has contribute to the | 6 |
|
| 5 | which has contributed to the | 6 |
|
