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

### Instruction:
When 36 is the amount of ends won how many sets of pf's are there?

### Inputs:
table_name: table, columns: ['Skip (Club)', 'W', 'L', 'PF', 'PA', 'Ends Won', 'Ends Lost', 'Blank Ends', 'Stolen Ends']

### Response:
SELECT COUNT PF FROM table WHERE Ends Won = 36