What is the sum of Blank Ends for Denmark when less than 42 is the ends lost?
CREATE TABLE "standings" (
  "nation" text,
  "skip" text,
  "ends_won" real,
  "ends_lost" real,
  "blank_ends" real,
  "stolen_ends" real,
  "shot_pct" text
);
SELECT SUM("blank_ends") FROM "standings" WHERE "nation"='denmark' AND "ends_lost"<42;