| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [noun] [is] [vb pp] | 5279 |
|
| 2 | level [prep] [noun] [be] [vb pp] | 163 |
|
| 3 | level [prep] [noun] [is] [verb] | 77 |
|
