 how many winning team with circuit being road america
CREATE TABLE "races" (
  "rnd" real,
  "race_name" text,
  "circuit" text,
  "city_location" text,
  "date" text,
  "pole_position" text,
  "fastest_lap" text,
  "winning_driver" text,
  "winning_team" text,
  "report" text
);
SELECT COUNT("winning_team") FROM "races" WHERE "circuit"='Road America';