CREATE TABLE "grand_slam_singles_performance_timeline" (
  "tournament" text,
  "1988" text,
  "1990" text,
  "1991" text,
  "1992" text,
  "1993" text,
  "1995" text,
  "1996" text,
  "1997" text,
  "1998" text,
  "1999" text,
  "2000" text,
  "2001" text,
  "career_sr" text,
  "career_win_loss" text
);

Question: What was the 1999 Tournament at the US Open?
SQL: SELECT "1999" FROM "grand_slam_singles_performance_timeline" WHERE "tournament"='us open';

Question: What tournament was an A 1988, and a 2R 1999?
SQL: SELECT "tournament" FROM "grand_slam_singles_performance_timeline" WHERE "1988"='a' AND "1999"='2r';

Question: What is the 1991 for 2R 1999?
SQL: SELECT "1991" FROM "grand_slam_singles_performance_timeline" WHERE "1999"='2r';

Question: What is the 1999 for an A 1991, and a 1r 1997?
SQL: SELECT "1999" FROM "grand_slam_singles_performance_timeline" WHERE "1991"='a' AND "1997"='1r';

Question: What is the 1991 with a 2r 1996?
SQL: SELECT "1991" FROM "grand_slam_singles_performance_timeline" WHERE "1996"='2r';