| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] is that [art] [adj] | 953 |
|
| 2 | difficulty be that [art] [adj] | 15 |
|
| 3 | difficulty [be] that [art] [adj] | 15 |
|
| 4 | difficulty [is] that [art] [adj] | 13 |
|
| 5 | difficulty is [conj] [art] [adj] | 13 |
|
