What is maximum loss record when the pa record is 47?
CREATE TABLE "asham_black_group" (
  "skip_club" text,
  "w" real,
  "l" real,
  "pf" real,
  "pa" real,
  "ends_won" real,
  "ends_lost" real,
  "blank_ends" real,
  "stolen_ends" real
);
SELECT MAX("l") FROM "asham_black_group" WHERE "pa"=47;