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

### Instruction:
Whose Runner-up has a Semifinalist of guillermo pérez-roldán andrea gaudenzi?

### Inputs:
table_name: table, columns: ['Week of', 'Tournament', 'Champions', 'Runners-up', 'Semifinalists']

### Response:
SELECT Runners-up FROM table WHERE Semifinalists = guillermo pérez-roldán andrea gaudenzi