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?
CREATE TABLE "complete_formula_one_world_championship_" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT COUNT("points") FROM "complete_formula_one_world_championship_" WHERE "entrant"='martini racing' AND "engine"='alfa romeo flat-12' AND "chassis"='brabham bt45' AND "year"=1976;