Question: when did skeleton get added to the olympics
[{'answer': '2002', 'provenance': [{'wikipedia_id': '159776', 'title': 'Skeleton (sport)', 'start_paragraph_id': 3, 'start_character': 164, 'end_paragraph_id': 3, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '159776', 'title': 'Skeleton (sport)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 225, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16821581908361191527}, 'section': 'Section::::Abstract.'}]}]