| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which [adv] [vb past] | 1819 |
|
| 2 | system which [adv] [verb] | 38 |
|
| 3 | system [pron] [adv] [vb past] | 10 |
|
| 4 | system which [adv] [vb past] | 9 |
|
