| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that it [is] essential for | 7 |
|
| 2 | that [pers pn] [is] essential for | 7 |
|
| 3 | that [pers pn] [is] essential for | 7 |
|
| 4 | that [pers pn] is essential for | 7 |
|
