| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | research is needed [prep] | 16 |
|
| 2 | research is need [prep] | 16 |
|
| 3 | research is need on | 5 |
|
| 4 | research is need in | 5 |
|
| 5 | research is need in | 5 |
|
| 6 | research is need on | 5 |
|
