Question: who won second head of household on big brother
[{'answer': 'Kaitlyn', 'provenance': [{'wikipedia_id': '51356934', 'title': 'Big Brother 20 (American season)', 'start_paragraph_id': 24, 'start_character': 302, 'end_paragraph_id': 24, 'end_character': 309, 'bleu_score': 1.0, 'section': 'Section::::HouseGuests.:Other appearances.\n'}]}]