CREATE TABLE table_18567 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What year was incumbent joe b. bates first elected?
SELECT "First elected" FROM table_18567 WHERE "Incumbent" = 'Joe B. Bates'
SELECT "First elected" FROM "table_18567" WHERE "Incumbent" = 'Joe B. Bates'