| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [noun sg] system for [verb] [noun pl] | 5 |
|
| 2 | [art] [noun sg] system for [verb] [noun] | 5 |
|
| 3 | [art] [noun sg] system for [v-ing] [noun] | 5 |
|
