| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be introduced [prep] [noun] | 129 |
|
| 2 | be [prep] [num ord] [noun] | 37 |
|
| 3 | be introduced [num ord] [noun] | 10 |
|
| 4 | introduced [prep] [num ord] [noun] | 8 |
|
| 5 | be introduced [prep] [num ord] | 5 |
|
