How many races did the German racer that won less than 10 races ride?
CREATE TABLE "highest_number_of_six_day_victories" (
  "name" text,
  "nationality" text,
  "races_won" real,
  "races_ridden" real,
  "win_average" real
);
SELECT COUNT("races_ridden") FROM "highest_number_of_six_day_victories" WHERE "nationality"='german' AND "races_won"<10;