| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] at [art] national | 79 |
|
| 2 | [noun pl] at [art] national | 79 |
|
| 3 | [noun pl] at the national | 72 |
|
| 4 | [noun pl] at a national | 7 |
|
| 5 | scientists at [art] national | 6 |
|
