Question: what is the traditional dividing line between europe and asia
[{'answer': 'Ural Mountains', 'provenance': [{'wikipedia_id': '13973661', 'title': 'Boundaries between the continents of Earth', 'start_paragraph_id': 51, 'start_character': 265, 'end_paragraph_id': 51, 'end_character': 279, 'bleu_score': 1.0, 'section': 'Section::::Europe and Asia.:History.\n'}]}, {'provenance': [{'wikipedia_id': '13973661', 'title': 'Boundaries between the continents of Earth', 'start_paragraph_id': 53, 'start_character': 0, 'end_paragraph_id': 53, 'end_character': 759, 'bleu_score': 0.984062469849008, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4770762406270324912}, 'section': 'Section::::Europe and Asia.:History.\n'}]}]