| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] [prep] a | 791 |
|
| 2 | [verb] [been] developed [prep] | 370 |
|
| 3 | [verb] developed [prep] a | 89 |
|
| 4 | [been] developed [prep] a | 52 |
|
