| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] is [art] | 23985 |
|
| 2 | difficult be [art] | 10 |
|
| 3 | difficult [be] [art] | 10 |
|
| 4 | difficult [is] [art] | 6 |
|
| 5 | difficult is [art] | 6 |
|
