Question: when does the 2018 tour de france start
[{'answer': '7 July', 'provenance': [{'wikipedia_id': '53438215', 'title': '2018 Tour de France', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]