| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] attack on [art] police [noun] | 5 |
|
| 2 | [art] attack on [art] police [noun] | 5 |
|
| 3 | an attack on [art] police [noun] | 5 |
|
| 4 | a attack on [art] police [noun] | 5 |
|
