Question: who sings the song begging you for mercy
[{'answer': 'Duffy', 'provenance': [{'wikipedia_id': '13979148', 'title': 'Mercy (Duffy song)', 'start_paragraph_id': 0, 'start_character': 7, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13979148', 'title': 'Mercy (Duffy song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 690, 'bleu_score': 0.957165036755604, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12797350596024460281}, 'section': 'Section::::Abstract.'}]}]