Question: In the 19th century opera composer Leo Slezak and the infamous Mozart originated from which European country?
{'answer': '18- and 19th-century composers were drawn to the city due to the patronage of the Habsburgs, and made Vienna the European capital of classical music.', 'supporting_facts': [['Leo Slezak', 0], ['Leo Slezak', 1], ['Music of Austria', 1]]}