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

### Instruction:
What is the April 14 rank when the Mar 3rd is nr, and the April 21 is 13?

### Inputs:
table_name: table, columns: ['Poll', 'Pre- season', 'Mar 3', 'Mar 17', 'Mar 24', 'Mar 31', 'April 7', 'April 14', 'April 21', 'April 28', 'May 5', 'May 12', 'May 19', 'May 26', 'Final']

### Response:
SELECT April 14 FROM table WHERE Mar 3 = nr AND April 21 = 13