CREATE TABLE table_18172 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB, "Candidates" CLOB)

What party was first elected in 1974?
SELECT "Party" FROM table_18172 WHERE "First elected" = '1974'
SELECT "Party" FROM "table_18172" WHERE "First elected" = '1974'