| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been an [noun] [prep] | 450 |
|
| 2 | not an [noun] [prep] | 383 |
|
| 3 | not been [noun] [prep] | 28 |
|
| 4 | not been an [noun] | 14 |
|
