| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have contributed [prep] the [noun] | 24 |
|
| 2 | may have contributed [prep] [art] [noun] | 24 |
|
| 3 | may have contributed to [art] [noun] | 24 |
|
| 4 | may have contributed [prep] the [noun] | 24 |
|
| 5 | may have contributed [prep] [art] [noun] | 24 |
|
| 6 | may have contributed [prep] [art] [noun sg] | 21 |
|
