Question: when did brent barry won the dunk contest
[{'answer': '1996', 'provenance': [{'wikipedia_id': '633925', 'title': 'Brent Barry', 'start_paragraph_id': 1, 'start_character': 378, 'end_paragraph_id': 1, 'end_character': 382, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '633925', 'title': 'Brent Barry', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 451, 'bleu_score': 0.5427081967339581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1826050868599344541}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '633925', 'title': 'Brent Barry', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Brent Robert Barry (born December 31, 1971), commonly known by the nickname Bones, is an American basketball executive, broadcaster and former player. He is the current vice president of basketball operations for the San Antonio Spurs. The , shooting guard played professionally in the National Basketball Association, winning two championships with the Spurs, and also won the 1996 NBA Slam Dunk Contest. He is the son of former NBA player Rick Barry.', 'Brent Robert Barry (born December 31, 1971), commonly known by the nickname Bones, is an American basketball executive, broadcaster and former player. He is the current vice president of basketball operations for the San Antonio Spurs. The , shooting guard played professionally in the National Basketball Association, winning two championships with the Spurs, and also won the 1996 NBA Slam Dunk Contest. He is the son of former NBA player Rick Barry.', 'The , shooting guard played professionally in the National Basketball Association, winning two championships with the Spurs, and also won the 1996 NBA Slam Dunk Contest. He is the son of former NBA player Rick Barry.']}}]}]