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

### Instruction:
How many winning constructor catagories are there when Mark Webber had the fastest lap?

### Inputs:
table_name: table, columns: ['Rd.', 'Grand Prix', 'Pole position', 'Fastest lap', 'Winning driver', 'Winning constructor', 'Report']

### Response:
SELECT COUNT Winning constructor FROM table WHERE Fastest lap = Mark Webber