Question: when did the beatles announce their break up
[{'answer': '10 April 1970', 'provenance': [{'wikipedia_id': '2441202', 'title': 'Break-up of the Beatles', 'start_paragraph_id': 1, 'start_character': 410, 'end_paragraph_id': 1, 'end_character': 423, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2441202', 'title': 'Break-up of the Beatles', 'start_paragraph_id': 1, 'start_character': 11, 'end_paragraph_id': 1, 'end_character': 479, 'bleu_score': 0.548129285918158, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16008756280342763891}, 'section': 'Section::::Abstract.'}]}]