| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | became the first [adj] head [prep] | 5 |
|
| 2 | became the first [adj] head [prep] | 5 |
|
| 3 | became the first [adj] head of | 5 |
|
| 4 | became the first [adj] head of | 5 |
|
