Question: when did lebron james play in the olympics
[{'answer': '2008', 'provenance': [{'wikipedia_id': '240940', 'title': 'LeBron James', 'start_paragraph_id': 1, 'start_character': 425, 'end_paragraph_id': 1, 'end_character': 429, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '2012', 'provenance': [{'wikipedia_id': '240940', 'title': 'LeBron James', 'start_paragraph_id': 3, 'start_character': 78, 'end_paragraph_id': 3, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '2004', 'provenance': [{'wikipedia_id': '240940', 'title': 'LeBron James', 'start_paragraph_id': 18, 'start_character': 16, 'end_paragraph_id': 18, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Professional career.:Cleveland Cavaliers.\n'}]}]