Table: thomas_muster_tournaments
Columns: tournament
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2010
2011

Question: What is the value in 1990 when it is A in 1989, 1985, and 1993?
SQL: SELECT "1990" FROM thomas_muster_tournaments WHERE "1989" = 'a' AND "1985" = 'a' AND "1993" = 'a'

Question: What is the value in 1988 when it is 2R in 1997 and SF in 1993?
SQL: SELECT "1988" FROM thomas_muster_tournaments WHERE "1997" = '2r' AND "1993" = 'sf'

Question: What is the value in 1987 when it is A in 1999, 1989, and 1997?
SQL: SELECT "1987" FROM thomas_muster_tournaments WHERE "1999" = 'a' AND "1989" = 'a' AND "1997" = 'a'