CREATE TABLE table_18257 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

what's the result with candidates being billy tauzin (d) unopposed
SELECT "Result" FROM table_18257 WHERE "Candidates" = 'Billy Tauzin (D) Unopposed'
SELECT "Result" FROM "table_18257" WHERE "Candidates" = 'Billy Tauzin (D) Unopposed'