| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which lead | 1431 |
|
| 2 | [Wh det] led | 975 |
|
| 3 | [Wh det] leads | 358 |
|
| 4 | [Wh det] lead | 147 |
|
| 5 | what lead | 47 |
|
