Question: when did 20000 leagues under the sea take place
[{'answer': 'March 1869 through June 1870', 'provenance': [{'wikipedia_id': '38093', 'title': 'Twenty Thousand Leagues Under the Sea', 'start_paragraph_id': 2, 'start_character': 41, 'end_paragraph_id': 2, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '38093', 'title': 'Twenty Thousand Leagues Under the Sea', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 674, 'bleu_score': 0.856318886036011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 298474131244100317}, 'section': 'Section::::Abstract.'}]}]