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

### Instruction:
Who won best amiga demo when tribes ( pulse & melon dezign) won best pc demo?

### Inputs:
table_name: table, columns: ['Year', 'Amiga demo', 'PC demo', 'C64 demo', 'Amiga intro', 'PC intro']

### Response:
SELECT Amiga demo FROM table WHERE PC demo = Tribes ( Pulse & Melon Dezign)