CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "1988" text,
  "1989" text,
  "1990" text,
  "1991" text,
  "1992" text,
  "1993" text,
  "1994" text,
  "1995" text,
  "1996" text,
  "1997" text,
  "1998" text,
  "1999" text,
  "2000" text,
  "2001" text,
  "2002" text,
  "2003" text,
  "2004" text,
  "career_sr" text,
  "career_win_loss" text
);

Question: What is 2001, when 1999 is "2R", and when 1992 is "3R"?
SQL: SELECT "2001" FROM "singles_performance_timeline" WHERE "1999"='2r' AND "1992"='3r';

Question: What is 1990, when 1997 is "1R", and when Tournament is "Hamburg"?
SQL: SELECT "1990" FROM "singles_performance_timeline" WHERE "1997"='1r' AND "tournament"='hamburg';

Question: What is 2001, when 1989 is "A", and when Tournament is "U.S. Open"?
SQL: SELECT "2001" FROM "singles_performance_timeline" WHERE "1989"='a' AND "tournament"='u.s. open';