Question: where are the largest number of polar bears found
[{'answer': 'Beaufort Sea', 'provenance': [{'wikipedia_id': '24408', 'title': 'Polar bear', 'start_paragraph_id': 13, 'start_character': 337, 'end_paragraph_id': 13, 'end_character': 349, 'bleu_score': 1.0, 'section': 'Section::::Population and distribution.\n'}]}, {'answer': 'Hudson Bay', 'provenance': [{'wikipedia_id': '24408', 'title': 'Polar bear', 'start_paragraph_id': 13, 'start_character': 359, 'end_paragraph_id': 13, 'end_character': 369, 'bleu_score': 1.0, 'section': 'Section::::Population and distribution.\n'}]}, {'answer': 'Baffin Bay', 'provenance': [{'wikipedia_id': '24408', 'title': 'Polar bear', 'start_paragraph_id': 13, 'start_character': 382, 'end_paragraph_id': 13, 'end_character': 392, 'bleu_score': 1.0, 'section': 'Section::::Population and distribution.\n'}]}, {'answer': 'Greenland', 'provenance': [{'wikipedia_id': '24408', 'title': 'Polar bear', 'start_paragraph_id': 13, 'start_character': 404, 'end_paragraph_id': 13, 'end_character': 413, 'bleu_score': 1.0, 'section': 'Section::::Population and distribution.\n'}]}, {'provenance': [{'wikipedia_id': '24408', 'title': 'Polar bear', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 464, 'bleu_score': 0.9392234271418961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1253473860716980582}, 'section': 'Section::::Population and distribution.\n'}]}]