Question: What were the names of the mixed doubles pair for the year that Ralph Nichols played in the men's singles match?
SQL: SELECT "Mixed doubles" FROM "2-12216479-1" WHERE "Men's singles" = 'Ralph Nichols';

Question: Who were the women's doubles pair in 1952?
SQL: SELECT "Women's doubles" FROM "2-12216479-1" WHERE "Year" = '1952';