| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] there have been [art] [adj] | 47 |
|
| 2 | [num] there have been a [adj] | 43 |
|
| 3 | [num] there have been [art] [adj] | 38 |
|
| 4 | [num] there have been a [adj] | 38 |
|
| 5 | [num] there has been [art] [adj] | 28 |
|
| 6 | [num] there had been [art] [adj] | 16 |
|
| 7 | 1980s there have been [art] [adj] | 7 |
|
| 8 | [num] there have been an [adj] | 5 |
|
