Question: who has won the tour de france without winning a stage
[{'answer': 'Firmin Lambot', 'provenance': [{'wikipedia_id': '6197452', 'title': 'Yellow jersey statistics', 'start_paragraph_id': 24, 'start_character': 131, 'end_paragraph_id': 24, 'end_character': 144, 'bleu_score': 1.0, 'section': 'Section::::Yellow jersey winners without winning any stage.\n'}]}, {'answer': 'Roger Walkowiak'}, {'answer': 'Gastone Nencini', 'provenance': [{'wikipedia_id': '6197452', 'title': 'Yellow jersey statistics', 'start_paragraph_id': 24, 'start_character': 202, 'end_paragraph_id': 24, 'end_character': 217, 'bleu_score': 1.0, 'section': 'Section::::Yellow jersey winners without winning any stage.\n'}]}, {'answer': 'Lucien Aimar'}, {'answer': 'Greg LeMond'}, {'answer': 'Óscar Pereiro'}, {'answer': 'Christopher Froome'}]