| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] required for [det] [noun] | 41 |
|
| 2 | [be] for [det] [noun] of | 25 |
|
| 3 | required for [det] [noun] of | 11 |
|
| 4 | [be] required for [noun] of | 7 |
|
