Question: when does season 12 of the voice start
[{'answer': 'February 27 , 2017', 'provenance': [{'wikipedia_id': '52470712', 'title': 'The Voice (American season 12)', 'start_paragraph_id': 1, 'start_character': 80, 'end_paragraph_id': 1, 'end_character': 100, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]