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

### Instruction:
Name the poll source for july 12, 2008

### Inputs:
table_name: table, columns: ['Poll Source', 'Dates administered', 'Democrat: Dick Durbin', 'Republican: Steve Sauerberg', 'Lead Margin']

### Response:
SELECT Poll Source FROM table WHERE Dates administered = July 12, 2008