Question: who sang the song i know him so well
[{'answer': 'Björn Ulvaeus', 'provenance': [{'wikipedia_id': '606125', 'title': 'I Know Him So Well', 'start_paragraph_id': 1, 'start_character': 118, 'end_paragraph_id': 1, 'end_character': 131, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Benny Andersson', 'provenance': [{'wikipedia_id': '606125', 'title': 'I Know Him So Well', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 113, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Tim Rice', 'provenance': [{'wikipedia_id': '606125', 'title': 'I Know Him So Well', 'start_paragraph_id': 1, 'start_character': 88, 'end_paragraph_id': 1, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '606125', 'title': 'I Know Him So Well', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 418, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16346613871335002621}, 'section': 'Section::::Abstract.'}]}]