Question: who won the world's strongest man 2015
[{'answer': 'Brian Shaw', 'provenance': [{'wikipedia_id': '944017', 'title': "World's Strongest Man", 'start_paragraph_id': 20, 'start_character': 326, 'end_paragraph_id': 20, 'end_character': 336, 'bleu_score': 1.0, 'section': 'Section::::History.:1990s–2000s.\n'}]}]