CREATE TABLE table_18564 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Which district is associated with the incumbent Carl Vinson?
SELECT "Candidates" FROM table_18564 WHERE "Incumbent" = 'Carl Vinson'
SELECT "Candidates" FROM "table_18564" WHERE "Incumbent" = 'Carl Vinson'