| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a [noun] | 61 |
|
| 2 | been written [prep] a [noun] | 21 |
|
| 3 | have been written [prep] a | 10 |
|
| 4 | have been written [prep] [noun] | 10 |
|
