| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] system [prep] [noun] [was/were] | 16 |
|
| 2 | [noun sg] system [prep] [noun] was | 14 |
|
| 3 | [noun sg] system [prep] [noun prp] [was/were] | 11 |
|
| 4 | [noun sg] system in [noun] [was/were] | 8 |
|
