Before the year 1988, what is the lowest number of points that entrant Coloni SpA scored?
CREATE TABLE "complete_formula_one_results" (
  "year" real,
  "entrant" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT MIN("points") FROM "complete_formula_one_results" WHERE "entrant"='coloni spa' AND "year"<1988;