| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [prep] the forefront | 66 |
|
| 2 | been [prep] [art] forefront | 66 |
|
| 3 | been at [art] forefront | 39 |
|
| 4 | been at [art] forefront | 39 |
|
| 5 | been in [art] forefront | 25 |
|
| 6 | been in [art] forefront | 25 |
|
