Question: when did the first season of the voice start
[{'answer': 'April 26 , 2011', 'provenance': [{'wikipedia_id': '32261806', 'title': 'The Voice (American season 1)', 'start_paragraph_id': 17, 'start_character': 64, 'end_paragraph_id': 17, 'end_character': 79, 'bleu_score': 1.0, 'section': 'Section::::Blind auditions.:Episode 1 (April 26).\n'}]}]