Question: who won the f1 grand prix at silverstone
[{'answer': 'Lewis Hamilton', 'provenance': [{'wikipedia_id': '294253', 'title': 'British Grand Prix', 'start_paragraph_id': 23, 'start_character': 914, 'end_paragraph_id': 23, 'end_character': 928, 'bleu_score': 1.0, 'section': "Section::::History.:Silverstone's evolution (1987–present).\n"}]}]