Question: when did the beatles first appear on ed sullivan
[{'answer': 'September 1965', 'provenance': [{'wikipedia_id': '140616', 'title': 'The Ed Sullivan Show', 'start_paragraph_id': 12, 'start_character': 3, 'end_paragraph_id': 12, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '140616', 'title': 'The Ed Sullivan Show', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 1260, 'bleu_score': 0.9745541077177141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18131917020638905863}, 'section': 'Section::::Background.\n'}]}]