| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [is] difficult to believe that [noun] | 5 |
|
| 2 | it [is] difficult to believe that [noun] | 5 |
|
| 3 | [pron] is difficult to believe that [noun] | 5 |
|
| 4 | [pers pn] [is] difficult to believe that [noun] | 5 |
|
| 5 | it [is] difficult to believe that [noun] | 5 |
|
