| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be maintain for [det] | 5 |
|
| 2 | [prep] be maintain for [det] | 5 |
|
| 3 | to be maintain for [det] | 5 |
|
| 4 | [prep] be maintain for [det] | 5 |
|
