| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has introduced [art] | 176 |
|
| 2 | has introduced a | 146 |
|
| 3 | has introduced a | 128 |
|
| 4 | has introduced the | 30 |
|
| 5 | has introduced the | 30 |
|
| 6 | has introduced an | 18 |
|
