CREATE TABLE table_30717 ("First air date" TEXT, "Reward" TEXT, "Immunity" TEXT, "Eliminated" TEXT, "Vote" TEXT, "Finish" TEXT)

What is the vote number when immunity listed as David and reward is listed as none?
SELECT "Vote" FROM table_30717 WHERE "Immunity" = 'David' AND "Reward" = 'None'
SELECT "Vote" FROM "table_30717" WHERE "Immunity" = 'David' AND "Reward" = 'None'