CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "1990" text,
  "1991" text,
  "1992" text,
  "1993" text,
  "1994" text,
  "1995" text,
  "1996" text
);

Question: What is 1993, when Tournament is "Cincinnati"?
SQL: SELECT "1993" FROM "singles_performance_timeline" WHERE "tournament"='cincinnati';

Question: What is 1994, when 1996 is "Grand Slams"?
SQL: SELECT "1994" FROM "singles_performance_timeline" WHERE "1996"='grand slams';

Question: What is Tournament, when 1996 is "1R", and when 1990 is "SF"?
SQL: SELECT "tournament" FROM "singles_performance_timeline" WHERE "1996"='1r' AND "1990"='sf';

Question: What is 1993, when 1992 is "SF", and when Tournament is "Paris"?
SQL: SELECT "1993" FROM "singles_performance_timeline" WHERE "1992"='sf' AND "tournament"='paris';