| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [art] | 2268 |
|
| 2 | must be a | 1168 |
|
| 3 | must be the | 799 |
|
| 4 | must be an | 218 |
|
| 5 | must be no | 79 |
|
