Question: who wrote the book uncle toms cabin which highlighted the horrors of slave life
[{'answer': 'Harriet Beecher Stowe', 'provenance': [{'wikipedia_id': '71989', 'title': "Uncle Tom's Cabin", 'start_paragraph_id': 1, 'start_character': 89, 'end_paragraph_id': 1, 'end_character': 110, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]