| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary if [art] | 58 |
|
| 2 | necessary if [art] | 58 |
|
| 3 | necessary if the | 52 |
|
| 4 | necessary if the | 52 |
|
| 5 | necessary if a | 6 |
|
| 6 | necessary if a | 5 |
|
