| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | system and a [adj] [noun] | 30 |
|
| 2 | system and a [adj] [noun sg] | 29 |
|
| 3 | system and a [adj] [noun] | 27 |
|
| 4 | system and a [adj] system | 5 |
|
| 5 | system and a [adj] system | 5 |
|
