Table: welsh_international_tennis
Columns: year
men_s_singles
women_s_singles
men_s_doubles
women_s_doubles
mixed_doubles

Question: Who won the Men's singles in the year that Ian Maconachie Marian Horsley won the Mixed doubles?
SQL: SELECT "men_s_singles" FROM welsh_international_tennis WHERE "mixed_doubles" = 'ian maconachie marian horsley'

Question: Who won the Women's singles, in the year that Raymond M. White won the Men's singles and that W. Hamilton Ian Maconachie won the Men's doubles?
SQL: SELECT "women_s_singles" FROM welsh_international_tennis WHERE "men_s_singles" = 'raymond m. white' AND "men_s_doubles" = 'w. hamilton ian maconachie'

Question: Who won the Women's doubles in the year that Billy Gilliland Karen Puttick won the Mixed doubles?
SQL: SELECT "women_s_doubles" FROM welsh_international_tennis WHERE "mixed_doubles" = 'billy gilliland karen puttick'

Question: Who won the Women's doubles in the year that David Eddy Eddy Sutton won the Men's doubles, and that David Eddy won the Men's singles?
SQL: SELECT "women_s_doubles" FROM welsh_international_tennis WHERE "men_s_doubles" = 'david eddy eddy sutton' AND "men_s_singles" = 'david eddy'

Question: Who won the Women's doubles in the year that Jesper Knudsen Nettie Nielsen won the Mixed doubles?
SQL: SELECT "women_s_doubles" FROM welsh_international_tennis WHERE "mixed_doubles" = 'jesper knudsen nettie nielsen'