Question: when does the adventures of tom sawyer take place
[{'answer': '1840s', 'provenance': [{'wikipedia_id': '46379460', 'title': 'The Adventures of Tom Sawyer', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 140, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46379460', 'title': 'The Adventures of Tom Sawyer', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 240, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18086060674921426883}, 'section': 'Section::::Abstract.'}]}]