What is the smallest Earnings that has a Money list rank of 6 and Starts smaller than 22?
CREATE TABLE "pga_tour_career_summary" (
  "year" text,
  "starts" real,
  "cuts_made" real,
  "wins" real,
  "top_10" real,
  "top_25" real,
  "earnings" real,
  "money_list_rank" text
);
SELECT MIN("earnings") FROM "pga_tour_career_summary" WHERE "money_list_rank"='6' AND "starts"<22;