| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is essential that [adj] | 81 |
|
| 2 | [pers pn] is essential that a | 17 |
|
| 3 | is essential that a [adj] | 6 |
|
| 4 | [pers pn] is that a [adj] | 6 |
|
