user: Question: What was the sample size for the poll featuring Republican Ron Paul?
Columns: ['Poll Source', 'Sample Size', 'Margin of Error', 'Date', 'Democrat', 'Republican']
Types: ['text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['Survey USA', 516.0, 4.4, 'Mar 14-16, 2008', 'Hillary Clinton', 'John McCain']
SQL:

assistant: SELECT "Sample Size" FROM "Table" WHERE "Republican" = 'Ron Paul';