| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be introduced [prep] [art] | 179 |
|
| 2 | be [prep] [art] [num ord] | 167 |
|
| 3 | introduced [prep] [art] [num ord] | 65 |
|
| 4 | be introduced [prep] [num ord] | 5 |
|
