| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | research [vb pp] out by the [noun] | 12 |
|
| 2 | research carried out by the [noun] | 12 |
|
| 3 | research [vb pp] out by the [noun] | 12 |
|
| 4 | research [vb pp] out by the [noun sg] | 8 |
|
