| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] made [pers pn] possible | 17 |
|
| 2 | [Wh det] [vb past] [pers pn] possible | 17 |
|
| 3 | [Wh det] [vb past] it possible | 16 |
|
| 4 | which [vb past] [pers pn] possible | 15 |
|
