Question: the practice of one woman having several husbands is called
[{'answer': 'Polyandry', 'provenance': [{'wikipedia_id': '24474', 'title': 'Polyandry', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24474', 'title': 'Polyandry', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 481, 'bleu_score': 0.881046239836158, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5278805339388282469}, 'section': 'Section::::Abstract.'}]}]