| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] essential that [det] | 60 |
|
| 2 | [pron] [is] essential that [noun pl] | 28 |
|
| 3 | [is] essential that [det] [noun pl] | 22 |
|
| 4 | [pron] [is] that [det] [noun pl] | 8 |
|
