| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have shown that a | 45 |
|
| 2 | have shown that a | 45 |
|
| 3 | have shown [that] a | 45 |
|
| 4 | have shown [conj] a | 21 |
|
| 5 | has shown [conj] a | 19 |
|
