| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which [vb mod] [be] referred to | 7 |
|
| 2 | [noun sg] which [vb mod] [be] referred to | 5 |
|
| 3 | which [vb mod] [be] referred to [prep] | 7 |
|
| 4 | which [vb mod] [be] referred to [prep] | 7 |
|
