| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] been a [adj] | 896 |
|
| 2 | [verb] been a [adj] factor | 63 |
|
| 3 | [noun] [verb] a [adj] factor | 17 |
|
| 4 | [noun] [verb] been a factor | 6 |
|
