Question: who won the sprint 15km men’s cross country skiing event in sochi in 2014
[{'answer': 'Dario Cologna', 'provenance': [{'wikipedia_id': '41546835', 'title': "Cross-country skiing at the 2014 Winter Olympics – Men's 15 kilometre classical", 'start_paragraph_id': 1, 'start_character': 152, 'end_paragraph_id': 1, 'end_character': 165, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]