Question: who wins the last hoh on big brother 20
[{'answer': 'Kaycee', 'provenance': [{'wikipedia_id': '51356934', 'title': 'Big Brother 20 (American season)', 'start_paragraph_id': 4, 'start_character': 540, 'end_paragraph_id': 4, 'end_character': 546, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]