Question: when was the rock and roll hall of fame established
[{'answer': 'April 20 , 1983', 'provenance': [{'wikipedia_id': '58902', 'title': 'Rock and Roll Hall of Fame', 'start_paragraph_id': 1, 'start_character': 360, 'end_paragraph_id': 1, 'end_character': 375, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '58902', 'title': 'Rock and Roll Hall of Fame', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 502, 'bleu_score': 0.8542713546029631, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17131813512288807769}, 'section': 'Section::::Abstract.'}]}]