Question: who sang what doesn't kill you makes you stronger
[{'answer': 'Kelly Clarkson', 'provenance': [{'wikipedia_id': '33167002', 'title': "Stronger (What Doesn't Kill You)", 'start_paragraph_id': 1, 'start_character': 74, 'end_paragraph_id': 1, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33167002', 'title': "Stronger (What Doesn't Kill You)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 708, 'bleu_score': 0.913739145355922, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4997500479469189352}, 'section': 'Section::::Abstract.'}]}]