What is the most current year signed for separation of † and a separation year of 1997?
CREATE TABLE "list_of_male_capital_artists_singers" (
  "english_name" text,
  "chinese_name" text,
  "year_signed" real,
  "year_separated" text,
  "reason_for_separation" text
);
SELECT MAX("year_signed") FROM "list_of_male_capital_artists_singers" WHERE "reason_for_separation"='†' AND "year_separated"='1997';