Question: when did belle isle became a state park
[{'answer': '2013', 'provenance': [{'wikipedia_id': '18952775', 'title': 'Belle Isle Park (Michigan)', 'start_paragraph_id': 1, 'start_character': 438, 'end_paragraph_id': 1, 'end_character': 442, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18952775', 'title': 'Belle Isle Park (Michigan)', 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 713, 'bleu_score': 0.7510736169613601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13247311426781423465}, 'section': 'Section::::Abstract.'}]}]