| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [is] essential for [art] | 8 |
|
| 2 | which [is] essential for [art] | 8 |
|
| 3 | [Wh det] [is] essential for the | 8 |
|
| 4 | [Wh det] [is] essential for the | 8 |
|
| 5 | [Wh det] is essential for [art] | 8 |
|
