Name the total number of monarchs for 23 may 1059 crowned
CREATE TABLE "capetian_associate_kings" (
  "co_king" text,
  "relationship_to_monarch" text,
  "crowned" text,
  "co_kingship_ceased" text,
  "reason" text,
  "monarch" text
);
SELECT COUNT("monarch") FROM "capetian_associate_kings" WHERE "crowned"='23 May 1059';