Question: Between Rienzi and Iphigénie en Aulide, which premiered earlier ?
{'answer': 'Iphigénie en Aulide', 'supporting_facts': [['Rienzi', 0], ['Rienzi', 2], ['Iphigénie en Aulide', 0], ['Iphigénie en Aulide', 2]]}