| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] go missing | 12 |
|
| 2 | [Wh pn] went missing | 12 |
|
| 3 | [Wh pn] [vb past] missing | 12 |
|
| 4 | who [verb] missing | 12 |
|
