What is 1994 when 1996 is 3R?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2000" text,
  "1999" text,
  "1998" text,
  "1997" text,
  "1996" text,
  "1995" text,
  "1994" text,
  "1993" text,
  "1992" text,
  "1991" text
);
SELECT "1994" FROM "singles_performance_timeline" WHERE "1996"='3r';