| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [prep] a [noun] | 81 |
|
| 2 | has been developed [prep] [noun] | 70 |
|
| 3 | been developed [prep] a [noun] | 34 |
|
| 4 | has been developed [prep] a | 25 |
|
| 5 | has developed [prep] a [noun] | 16 |
|
