Question: when did the mamas & papas break up
[{'answer': 'beginning of 1969'}, {'provenance': [{'wikipedia_id': '164561', 'title': 'The Mamas and the Papas', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 782, 'bleu_score': 0.7921162747012991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14366985386606950972}, 'section': 'Section::::Career.:1968–1969: Break-up and "People Like Us".\n'}]}]