| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] system it [be] | 18 |
|
| 2 | [noun sg] system it be | 18 |
|
| 3 | [noun sg] system it [is] | 16 |
|
| 4 | [noun sg] system it is | 13 |
|
