user: Question: Which Democrat was selected in the poll with a sample size smaller than 516 where the Republican chosen was Ron Paul?
Columns: ['Poll Source', 'Sample Size', 'Margin of Error', 'Date', 'Democrat', 'Republican']
Types: ['text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['Quinnipiac', 1528.0, 2.5, 'Mar 16-18, 2008', 'Hillary Clinton', 'John McCain']
SQL:

assistant: SELECT "Democrat" FROM "Table" WHERE "Sample Size" < 516.0 AND "Republican" = 'Ron Paul';