Table: czech_international_tennis
Columns: year
men_s_singles
women_s_singles
men_s_doubles
women_s_doubles
mixed_doubles

Question: Who played in the men's singles during the tournament where Ragna Ingolfsdottir played in the women's singles?
SQL: SELECT "men_s_singles" FROM czech_international_tennis WHERE "women_s_singles" = 'ragna ingolfsdottir'

Question: Who won the men's doubles in 1995?
SQL: SELECT "men_s_doubles" FROM czech_international_tennis WHERE "year" = 1995