Question: who sang killing me softly in the 70s
[{'answer': 'Lori Lieberman', 'provenance': [{'wikipedia_id': '1718553', 'title': 'Killing Me Softly with His Song', 'start_paragraph_id': 2, 'start_character': 43, 'end_paragraph_id': 2, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1718553', 'title': 'Killing Me Softly with His Song', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 373, 'bleu_score': 0.806314284895832, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8975795958204913378}, 'section': 'Section::::Abstract.'}]}]