What is the School/Club Team with a nationality of United States for Arron Afflalo?
CREATE TABLE "a" (
  "player" text,
  "nationality" text,
  "position" text,
  "years_in_orlando" text,
  "school_club_team" text
);
SELECT "school_club_team" FROM "a" WHERE "nationality"='united states' AND "player"='arron afflalo';