user: Question: What is John Kerry, when John Edwards is "20%"?
Columns: ['Classification', '% of all', 'John Kerry', 'John Edwards', 'Dennis Kucinich']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Male', '47%', '65%', '18%', '5%']
SQL:

assistant: SELECT "John Kerry" FROM "Table" WHERE "John Edwards" = '20%';