| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] has led to a | 24 |
|
| 2 | [det] has led [prep] a | 21 |
|
| 3 | this has led [prep] a | 19 |
|
| 4 | this has led [prep] a | 19 |
|
