| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is difficult believe that [det] | 6 |
|
| 2 | is difficult believe [that] [det] | 6 |
|
| 3 | is difficult believe that [det] | 6 |
|
| 4 | is difficult to believe [conj] [det] | 6 |
|
