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

### Instruction:
How many rounds have a Pick of 13?

### Inputs:
table_name: table, columns: ['Round', 'Pick', 'Player', 'Pos.', 'Nationality', 'Team', 'School/club team']

### Response:
SELECT SUM Round FROM table WHERE Pick = 13