| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] to experts | 9 |
|
| 2 | [noun sg] to experts | 8 |
|
| 3 | reference to experts | 7 |
|
| 4 | references to experts | 6 |
|
| 5 | challenge to experts | 5 |
|
