| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] was [art] | 33409 |
|
| 2 | [noun sg] was [art] | 22638 |
|
| 3 | system be [art] | 327 |
|
| 4 | system [be] [art] | 327 |
|
| 5 | system [was/were] [art] | 70 |
|
| 6 | system was [art] | 69 |
|
