Question: when did eminem's album revival come out
[{'answer': 'December 15 , 2017', 'provenance': [{'wikipedia_id': '55626713', 'title': 'Revival (Eminem album)', 'start_paragraph_id': 1, 'start_character': 87, 'end_paragraph_id': 1, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '55626713', 'title': 'Revival (Eminem album)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 175, 'bleu_score': 0.9243880458347601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3106379235929313926}, 'section': 'Section::::Abstract.'}]}]