Question: who sang the original song i only have eyes for you
[{'answer': 'Dick Powell and Ruby Keeler', 'provenance': [{'wikipedia_id': '5815185', 'title': 'I Only Have Eyes for You', 'start_paragraph_id': 1, 'start_character': 162, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5815185', 'title': 'I Only Have Eyes for You', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 441, 'bleu_score': 0.8196078948539751, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6733038621497153965}, 'section': 'Section::::Abstract.'}]}]