| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] are essential for [adj] [noun sg] | 5 |
|
| 2 | are essential for [art] [adj] [noun sg] | 13 |
|
| 3 | are essential for [art] [adj] [noun sg] | 13 |
|
| 4 | are essential for the [adj] [noun sg] | 10 |
|
| 5 | are essential for the [adj] [noun sg] | 10 |
|
