Question: when did season 6 of game of thrones start
[{'answer': 'April 24 , 2016', 'provenance': [{'wikipedia_id': '43186937', 'title': 'Game of Thrones (season 6)', 'start_paragraph_id': 1, 'start_character': 94, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43186937', 'title': 'Game of Thrones (season 6)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 688, 'bleu_score': 0.8582942599126171, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10920035962958432364}, 'section': 'Section::::Abstract.'}]}]