| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] is [vb pp] | 5822 |
|
| 2 | level [prep] [noun] [vb pp] | 315 |
|
| 3 | level [prep] [noun] is | 246 |
|
| 4 | level [noun] is [vb pp] | 6 |
|
