Table: belgian_international_tennis
Columns: year
men_s_singles
women_s_singles
men_s_doubles
women_s_doubles
mixed_doubles

Question: What year had a Women's doubles and Women's singles with no competition?
SQL: SELECT "year" FROM belgian_international_tennis WHERE "women_s_doubles" = 'no competition' AND "women_s_singles" = 'no competition'

Question: The year the Women's singles was won by Christine Magnusson who was the winner of the Men's singles?
SQL: SELECT "men_s_singles" FROM belgian_international_tennis WHERE "women_s_singles" = 'christine magnusson'

Question: In 1982, when the Men's doubles had no competition who won the Women's singles?
SQL: SELECT "women_s_singles" FROM belgian_international_tennis WHERE "men_s_doubles" = 'no competition' AND "year" = '1982'

Question: When Steve Baddeley won the Men's singles who won the Women's singles?
SQL: SELECT "women_s_singles" FROM belgian_international_tennis WHERE "men_s_singles" = 'steve baddeley'

Question: When Marja Ridder won the Women's singles who won the Men's singles?
SQL: SELECT "men_s_singles" FROM belgian_international_tennis WHERE "women_s_singles" = 'marja ridder'