Which 1988 has a 1982 of 104?
CREATE TABLE "grand_slam_performance_timeline" (
  "tournament" text,
  "1981" text,
  "1982" text,
  "1983" text,
  "1984" text,
  "1985" text,
  "1986" text,
  "1987" text,
  "1988" text,
  "1989" text
);
SELECT "1988" FROM "grand_slam_performance_timeline" WHERE "1982"='104';