| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which is [verb] [prep] the | 1127 |
|
| 2 | system is [verb] [prep] the | 73 |
|
| 3 | system which is [verb] [prep] | 25 |
|
| 4 | system which [verb] [prep] the | 23 |
|
