CREATE TABLE table_18463 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Name the incumbent for first elected 1956
SELECT "Incumbent" FROM table_18463 WHERE "First elected" = '1956'
SELECT "Incumbent" FROM "table_18463" WHERE "First elected" = '1956'