Who won the ABA Championship in 1971?
CREATE TABLE "results_by_teams" (
  "teams" text,
  "finals_appearances" real,
  "championships" real,
  "runners_up" real,
  "years_won" text,
  "years_runners_up" text
);
SELECT MIN("championships") FROM "results_by_teams" WHERE "years_won"='1971';