Question: who wins the last head of household on big brother
[{'answer': 'Josh', 'provenance': [{'wikipedia_id': '51296550', 'title': 'Big Brother 19 (American season)', 'start_paragraph_id': 2, 'start_character': 23, 'end_paragraph_id': 2, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]