| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] [that] [art] [adj] system | 6 |
|
| 2 | is [verb] [that] the [adj] system | 6 |
|
| 3 | is [verb] that [art] [adj] system | 6 |
|
| 4 | is [vb pp] [that] [art] [adj] system | 6 |
|
| 5 | is [verb] [that] the [adj] system | 6 |
|
