Schema: CREATE TABLE table_name_15 (entrant VARCHAR, points VARCHAR, chassis VARCHAR, engine VARCHAR, year VARCHAR)
Question: Which entrant, with an Offenhauser L4 engine and a Kurtis Kraft KK500A chassis, scored 9 points before 1955?
SQL: SELECT entrant FROM table_name_15 WHERE engine = "offenhauser l4" AND year < 1955 AND chassis = "kurtis kraft kk500a" AND points = 9