Question: when was the last time the olympics were held in greece
[{'answer': '2004', 'provenance': [{'wikipedia_id': '3629172', 'title': 'Greece at the Olympics', 'start_paragraph_id': 2, 'start_character': 217, 'end_paragraph_id': 2, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3629172', 'title': 'Greece at the Olympics', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 456, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15102924770510569086}, 'section': 'Section::::Hosted Games.\n'}]}]