| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [that] is [adv] [vb pp] | 365 |
|
| 2 | system is [adv] [vb pp] | 123 |
|
| 3 | system [that] is [adv] | 22 |
|
| 4 | system [that] is [vb pp] | 14 |
|
