Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
When the final position/round is group stage, when is the last match?

### Inputs:
table_name: table, columns: ['Competition', 'Current position / round', 'Final position / round', 'First match', 'Last match']

### Response:
SELECT Last match FROM table WHERE Final position / round = group stage