| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] [adj] [noun] | 7880 |
|
| 2 | systems [verb] [adj] [noun] | 140 |
|
| 3 | systems which [verb] [noun] | 25 |
|
| 4 | systems which [verb] [adj] | 22 |
|
