CREATE TABLE table_791 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

What is the last year incumbent frederick h. dominick was first elected?
SELECT MAX("First elected") FROM table_791 WHERE "Incumbent" = 'Frederick H. Dominick'
SELECT MAX("First elected") FROM "table_791" WHERE "Incumbent" = 'Frederick H. Dominick'