Question: how many stages does tour de france have
[{'answer': '21', 'provenance': [{'wikipedia_id': '30498', 'title': 'Tour de France', 'start_paragraph_id': 1, 'start_character': 240, 'end_paragraph_id': 1, 'end_character': 242, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30498', 'title': 'Tour de France', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 263, 'bleu_score': 0.604361435326287, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10091960475720983325}, 'section': 'Section::::Abstract.'}]}]