| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] necessary and [adj] [noun] for | 9 |
|
| 2 | [art] necessary and [adj] [noun] for | 9 |
|
| 3 | a necessary and [adj] [noun] for | 6 |
|
| 4 | a necessary and [adj] [noun] for | 6 |
|
