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

### Instruction:
what are all the gtc winners for pole position no. 21 team modena

### Inputs:
table_name: table, columns: ['Round', 'Circuit', 'Date', 'Length', 'Pole Position', 'GT3 Winner', 'GTC Winner']

### Response:
SELECT GTC Winner FROM table WHERE Pole Position = No. 21 Team Modena