Question: where did the traditional heart shape come from
[{'answer': 'Europe', 'provenance': [{'wikipedia_id': '2414831', 'title': 'Heart (symbol)', 'start_paragraph_id': 7, 'start_character': 378, 'end_paragraph_id': 7, 'end_character': 384, 'bleu_score': 1.0, 'section': 'Section::::History.:Earliest use.\n'}]}, {'provenance': [{'wikipedia_id': '2414831', 'title': 'Heart (symbol)', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 762, 'bleu_score': 0.9651324673660481, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14698251888820358871}, 'section': 'Section::::History.:Earliest use.\n'}]}]