Which Tournament has a 1984 of 1r?
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 "tournament" FROM "grand_slam_performance_timeline" WHERE "1984"='1r';