CREATE TABLE table_72805 ("Poll Source" TEXT, "Dates administered" TEXT, "Democrat: John Kerry" TEXT, "Republican: Jeff Beatty" TEXT, "Lead Margin" FLOAT)

what is the percentage for john kerry and dates administered is april 22, 2008?
SELECT "Democrat: John Kerry" FROM table_72805 WHERE "Dates administered" = 'April 22, 2008'
SELECT "Democrat: John Kerry" FROM "table_72805" WHERE "Dates administered" = 'April 22, 2008'