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

### Instruction:
How many heavy attacks did the 450 Luftflotte 2 conduct?

### Inputs:
table_name: table, columns: ['Month/Year', 'Day Sorties (losses)', 'Night Sorties (Losses)', 'Luftflotte 2 sorties', 'Luftflotte 3 sorties', 'Major attacks', 'Heavy attacks']

### Response:
SELECT COUNT Heavy attacks FROM table WHERE Luftflotte 2 sorties = 450