| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] have been a [adj] factor | 7 |
|
| 2 | [det] have been a [adj] factor | 5 |
|
| 3 | this have been a [adj] factor | 5 |
|
| 4 | this have been a [adj] factor | 5 |
|
