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

### Instruction:
Which polling firm put T. Papadopoulos at 31%?

### Inputs:
table_name: table, columns: ['Polling Firm', 'Date Published', 'T. Papadopoulos', 'D. Christofias', 'I. Kasoulidis', 'K. Themistokleous']

### Response:
SELECT Polling Firm FROM table WHERE T. Papadopoulos = 31%