When chris barnes is on team usa how many europe teams are there?
CREATE TABLE "day_2_evening_session" (
  "match_no" real,
  "match_type" text,
  "team_europe" text,
  "score" text,
  "team_usa" text,
  "progressive_total" text
);
SELECT COUNT("team_europe") FROM "day_2_evening_session" WHERE "team_usa"='Chris Barnes';