| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | necessary for [art] [adj] [noun] | 148 |
|
| 2 | [am/are] for [art] [adj] [noun] | 50 |
|
| 3 | [am/are] necessary for [art] [noun] | 28 |
|
| 4 | [am/are] necessary for [adj] [noun] | 17 |
|
| 5 | [am/are] necessary for [art] [adj] | 16 |
|
