| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] be at the forefront of | 14 |
|
| 2 | [prep] [be] at the forefront of | 14 |
|
| 3 | [prep] [be] at the forefront of | 14 |
|
| 4 | [prep] be at the forefront of | 13 |
|
| 5 | [prep] [be] at the forefront of | 13 |
|
| 6 | to [be] at the forefront of | 13 |
|
| 7 | to [be] at the forefront of | 13 |
|
