Question: Which Men's singles has a Mixed doubles of Kai Abraham Petra Michalowsky?
SQL: SELECT "Men's singles" FROM "2-12154617-1" WHERE "Mixed doubles" = 'Kai Abraham Petra Michalowsky';

Question: Which women's doubles has a Year of 1992?
SQL: SELECT "Women's doubles" FROM "2-12154617-1" WHERE "Year" = '1992';

Question: Which year has a Men's doubles of Marcus Ellis Peter Mills?
SQL: SELECT "Year" FROM "2-12154617-1" WHERE "Men's doubles" = 'Marcus Ellis Peter Mills';