| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] more research | 11 |
|
| 2 | [noun] [prep] more research | 8 |
|
| 3 | call [prep] more research | 8 |
|
| 4 | [noun sg] [prep] more research | 6 |
|
| 5 | [prep] more research [prep] | 11 |
|
| 6 | [prep] more research [prep] | 11 |
|
| 7 | [prep] more research into | 6 |
|
| 8 | [prep] more research into | 6 |
|
