| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [adj] [noun] system had be | 7 |
|
| 2 | [art] [adj] [noun] system had be | 7 |
|
| 3 | the [adj] [noun] system had be | 5 |
|
| 4 | the [adj] [noun] system had be | 5 |
|
| 5 | [adj] [noun] system had be [vb pp] | 6 |
|
| 6 | [adj] [noun] system had be [verb] | 6 |
|
