Question: who sang your a mean one mr. grinch
[{'answer': 'Thurl Ravenscroft', 'provenance': [{'wikipedia_id': '3678550', 'title': "You're a Mean One, Mr. Grinch", 'start_paragraph_id': 3, 'start_character': 125, 'end_paragraph_id': 3, 'end_character': 142, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '3678550', 'title': "You're a Mean One, Mr. Grinch", 'start_paragraph_id': 3, 'start_character': 4, 'end_paragraph_id': 3, 'end_character': 390, 'bleu_score': 0.8167080173839241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6842851236764500687}, 'section': 'Section::::History.\n'}]}]