| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] system be [art] [noun sg] | 9 |
|
| 2 | this system be [art] [noun] | 8 |
|
| 3 | [det] system be the [noun] | 7 |
|
| 4 | [det] system is [art] [noun] | 6 |
|
