Question: Who won the Women's singles in 2013?
SQL: SELECT "Women's singles" FROM "2-12154722-1" WHERE "Year" = '2013';

Question: Who won the Men's doubles when there was No competition in the Men's singles?
SQL: SELECT "Men's doubles" FROM "2-12154722-1" WHERE "Men's singles" = 'No competition';

Question: What year was there No competition in Mixed Doubles?
SQL: SELECT "Year" FROM "2-12154722-1" WHERE "Mixed doubles" = 'No competition';

Question: What year did Lonneke Janssen win the Women's singles?
SQL: SELECT "Year" FROM "2-12154722-1" WHERE "Women's singles" = 'Lonneke Janssen';