| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which has [been] [noun] | 16 |
|
| 2 | which [vb -s] [been] [noun] | 16 |
|
| 3 | which [vb -s] been [noun] | 16 |
|
| 4 | which [vb -s] [been] [noun sg] | 15 |
|
