CREATE TABLE table_18289 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who's the incumbent in the district first elected in 1976?
SELECT "Incumbent" FROM table_18289 WHERE "First elected" = '1976'
SELECT "Incumbent" FROM "table_18289" WHERE "First elected" = '1976'