| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system which [modal v] [verb] [art] [noun sg] | 10 |
|
| 2 | system which [modal v] [verb] [art] [noun sg] | 10 |
|
| 3 | system which [modal v] [verb] the [noun sg] | 7 |
|
| 4 | system which [modal v] [verb] the [noun sg] | 7 |
|
