user: Question: Which Men's singles has a Mixed doubles of Kai Abraham Petra Michalowsky?
Columns: ['Year', "Men's singles", "Men's doubles", "Women's doubles", 'Mixed doubles']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1985', 'Heinz Fischer', 'Heinz Fischer Jeliazko Valkov', 'Monika Cassens Kerstin Bohn', 'Thomas Mundt Monika Cassens']
SQL:

assistant: SELECT "Men's singles" FROM "Table" WHERE "Mixed doubles" = 'Kai Abraham Petra Michalowsky';