user: Question: what is the percentage for john kerry and dates administered is April 22, 2008?
Columns: ['Poll Source', 'Dates administered', 'Democrat: John Kerry', 'Republican: Jeff Beatty', 'Lead Margin']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Survey USA', 'October 28, 2008', '58%', '34%', 24.0]
SQL:

assistant: SELECT "Democrat: John Kerry" FROM "Table" WHERE "Dates administered" = 'April 22, 2008';