| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] on a | 2252 |
|
| 2 | [prep] [noun] [was/were] a | 1236 |
|
| 3 | [noun] [was/were] on a | 241 |
|
| 4 | [prep] [noun] [was/were] on | 148 |
|
