Question: when did the first oscar ceremony take place
[{'answer': 'May 16 , 1929', 'provenance': [{'wikipedia_id': '1625068', 'title': '1st Academy Awards', 'start_paragraph_id': 7, 'start_character': 25, 'end_paragraph_id': 7, 'end_character': 40, 'bleu_score': 1.0, 'section': 'Section::::Ceremony.\n'}]}, {'provenance': [{'wikipedia_id': '1625068', 'title': '1st Academy Awards', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 734, 'bleu_score': 0.9487850841042331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16678253123202600091}, 'section': 'Section::::Abstract.'}]}]