Table: tennis_performance
Columns: tournament
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991

Question: What is the 1994 when QF is 1999?
SQL: SELECT "1994" FROM tennis_performance WHERE "1999" = 'qf'

Question: What is the 1991 when 1997 is 18?
SQL: SELECT "1991" FROM tennis_performance WHERE "1997" = '18'

Question: What's the 1991 when 1999 is 14?
SQL: SELECT "1991" FROM tennis_performance WHERE "1999" = '14'

Question: What's the 1996 when 1997 is 3R?
SQL: SELECT "1996" FROM tennis_performance WHERE "1997" = '3r'

Question: What is 1994 when 1996 is 3R?
SQL: SELECT "1994" FROM tennis_performance WHERE "1996" = '3r'

Question: What is 1996 during the US Open?
SQL: SELECT "1996" FROM tennis_performance WHERE "tournament" = 'us open'