| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not know the [noun sg] to | 28 |
|
| 2 | not know the [noun sg] to | 27 |
|
| 3 | not know the answer to | 21 |
|
| 4 | n't know the [noun sg] to | 16 |
|
| 5 | not know the [noun sg] to | 12 |
|
| 6 | not know the extent to | 5 |
|
