Question: who wrote the shortest book in the old testament
[{'answer': 'Book of Obadiah', 'provenance': [{'wikipedia_id': '4450', 'title': 'Book of Obadiah', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4450', 'title': 'Book of Obadiah', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 213, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13326579210751968588}, 'section': 'Section::::Abstract.'}]}]