| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] have been introduced [prep] [adj] | 14 |
|
| 2 | [noun pl] have been introduced [prep] [adj] | 10 |
|
| 3 | [noun pl] [vb base] been introduced [prep] [adj] | 10 |
|
| 4 | [noun pl] [verb] been introduced in [adj] | 6 |
|
| 5 | [noun pl] [verb] been introduced [prep] [det] | 5 |
|
| 6 | [noun pl] [verb] been introduced [prep] [adj] | 5 |
|
