| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] introduced for [art] [num ord] | 7 |
|
| 2 | be introduce for [art] [num ord] | 7 |
|
| 3 | [be] introduce for [art] first | 7 |
|
| 4 | [be] introduce for the [num ord] | 7 |
|
