| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has a duty | 51 |
|
| 2 | [noun sg] has a duty | 46 |
|
| 3 | authority has a duty | 6 |
|
| 4 | authority has a duty | 6 |
|
| 5 | state has a duty | 5 |
|
| 6 | state has a duty | 5 |
|
