Question: Name the women's singles for 1991
SQL: SELECT "Women's singles" FROM "2-12390176-1" WHERE "Year" = 1991.0;

Question: Name the women's doubles for mixed doubles of No competition
SQL: SELECT "Women's doubles" FROM "2-12390176-1" WHERE "Mixed doubles" = 'No competition';

Question: Name the women's singles for Glenn MacFarlane Mark Leadbeater
SQL: SELECT "Women's singles" FROM "2-12390176-1" WHERE "Men's doubles" = 'Glenn MacFarlane Mark Leadbeater';

Question: Name the women's doubles for Frederik Kjærholm Elsner
SQL: SELECT "Women's doubles" FROM "2-12390176-1" WHERE "Men's singles" = 'Frederik Kjærholm Elsner';

Question: Name the year for Anton Kriel Chris Cotillard
SQL: SELECT "Year" FROM "2-12390176-1" WHERE "Men's doubles" = 'Anton Kriel Chris Cotillard';

Question: Name the men's doubles for years before 1999 and Elizabeth Cann for women's singles
SQL: SELECT "Men's doubles" FROM "2-12390176-1" WHERE "Year" < 1999.0 AND "Women's singles" = 'Elizabeth Cann';