Question: How many womens doubles had champions the years broddi kristjánsson drífa harðardóttir won mixed doubles
Schema: create table table_14903999_1 (womens_doubles varchar, mixed_doubles varchar, PRIMARY KEY (womens_doubles))
SQL: select count(womens_doubles) from table_14903999_1 where mixed_doubles = "broddi kristjánsson drífa harðardóttir"