| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] system and a [noun] | 25 |
|
| 2 | [noun] system and a [noun sg] | 22 |
|
| 3 | [noun] system and a [noun] | 19 |
|
| 4 | [noun] systems and a [noun] | 7 |
|
