| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which [vb -s] a | 1287 |
|
| 2 | [noun] system which [vb -s] | 141 |
|
| 3 | [noun] system [vb -s] a | 59 |
|
| 4 | system which [vb -s] a | 21 |
|
