| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | by [noun] [noun] [noun] | 10358 |
|
| 2 | by [noun prp] [noun] [noun] | 7762 |
|
| 3 | [prep] professor [noun] [noun] | 327 |
|
| 4 | [prep] professor [noun] [noun] | 327 |
|
| 5 | by professor [noun] [noun] | 173 |
|
| 6 | by professor [noun] [noun] | 169 |
|
