Question: when did nhl players start to play in the olympics
[{'answer': '1998', 'provenance': [{'wikipedia_id': '1855215', 'title': 'Ice hockey at the Olympic Games', 'start_paragraph_id': 1, 'start_character': 270, 'end_paragraph_id': 1, 'end_character': 274, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1855215', 'title': 'Ice hockey at the Olympic Games', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 912, 'bleu_score': 0.9868845362499331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12634511277663143971}, 'section': 'Section::::Abstract.'}]}]