| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | about [Wh det] [is] | 345 |
|
| 2 | about what [is] | 331 |
|
| 3 | about [Wh det] is | 230 |
|
| 4 | about [Wh det] 's | 115 |
|
| 5 | about which [is] | 14 |
|
