Question: who has won the golden boot in 2018
[{'answer': 'Lionel Messi', 'provenance': [{'wikipedia_id': '1601889', 'title': 'European Golden Shoe', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Statistics.:Multiple winners.\n'}]}]