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

### Instruction:
how many acc football titles have been won by the institution nicknamed tar heels?

### Inputs:
table_name: table, columns: ['Institution', 'Nickname', 'Location', 'Founded', 'Joined ACC', 'School Type', 'ACC Football Titles']

### Response:
SELECT ACC Football Titles FROM table WHERE Nickname = Tar Heels