Question: who won the first ever nba slam dunk contest
[{'answer': 'Larry Nance Sr.', 'provenance': [{'wikipedia_id': '1826771', 'title': 'Slam Dunk Contest', 'start_paragraph_id': 2, 'start_character': 44, 'end_paragraph_id': 2, 'end_character': 59, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1826771', 'title': 'Slam Dunk Contest', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 180, 'bleu_score': 0.762775323450774, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5599183007266162594}, 'section': 'Section::::Abstract.'}]}]