Question: when did the first season of the voice air
[{'answer': '2011', 'provenance': [{'wikipedia_id': '32261806', 'title': 'The Voice (American season 1)', 'start_paragraph_id': 10, 'start_character': 17, 'end_paragraph_id': 10, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Coaches, host, and social media correspondent.\n'}]}]