Schema: CREATE TABLE table_name_43 (points VARCHAR, year VARCHAR, chassis VARCHAR, entrant VARCHAR, engine VARCHAR)
Question: How many points does an entrant of Martini Racing, the engine of an Alfa Romeo flat-12 a chassis of brabham bt45, and the year 1976 have?
SQL: SELECT COUNT(points) FROM table_name_43 WHERE entrant = "martini racing" AND engine = "alfa romeo flat-12" AND chassis = "brabham bt45" AND year = 1976