| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] at [art] [noun] | 1575 |
|
| 2 | [be] at [art] forefront | 143 |
|
| 3 | [was/were] [prep] [art] forefront | 58 |
|
| 4 | [was/were] [prep] [art] forefront | 58 |
|
| 5 | [was/were] at [art] forefront | 33 |
|
| 6 | [was/were] at [art] forefront | 33 |
|
