| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | n't know the [noun] to | 19 |
|
| 2 | n't know the [noun] to | 19 |
|
| 3 | n't know the [noun sg] to | 16 |
|
| 4 | n't know the answer to | 16 |
|
| 5 | n't know the answer to | 14 |
|
