Question: Which men's singles has a women's singles of Marketa Koudelková as well as a Men's doubles of Jan Lanik / Pavel Weigner??
SQL: SELECT "Men's singles" FROM "2-15741227-3" WHERE "Women's singles" = 'Marketa Koudelková' AND "Men's doubles" = 'Jan Lanik / Pavel Weigner';

Question: Which men's singles had a women's doubles team of Irena Ferencová / Yweta Trminková?
SQL: SELECT "Men's singles" FROM "2-15741227-3" WHERE "Women's doubles" = 'Irena Ferencová / Yweta Trminková';

Question: What is the mean year when the women's doubles team was Helena Turcinková / Buresová?
SQL: SELECT AVG("Year") FROM "2-15741227-3" WHERE "Women's doubles" = 'Helena Turcinková / Buresová';