Question: who wrote how to mend a broken heart
[{'answer': 'Barry Gibb', 'provenance': [{'wikipedia_id': '5516321', 'title': 'How Can You Mend a Broken Heart', 'start_paragraph_id': 11, 'start_character': 12, 'end_paragraph_id': 11, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Personnel.\n'}]}, {'answer': 'Robin Gibb', 'provenance': [{'wikipedia_id': '5516321', 'title': 'How Can You Mend a Broken Heart', 'start_paragraph_id': 1, 'start_character': 113, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]