| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system that can be [vb pp] | 15 |
|
| 2 | system that can be [verb] | 15 |
|
| 3 | systems that can be [verb] | 9 |
|
| 4 | system that can be [verb] | 6 |
|
