Question: when did the great white shark first appear
[{'answer': 'about 16 million years old', 'provenance': [{'wikipedia_id': '43619', 'title': 'Great white shark', 'start_paragraph_id': 8, 'start_character': 56, 'end_paragraph_id': 8, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Taxonomy.:Ancestry and fossil record.\n'}]}, {'provenance': [{'wikipedia_id': '43619', 'title': 'Great white shark', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 1545, 'bleu_score': 0.942167995978569, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14748898019826687909}, 'section': 'Section::::Taxonomy.:Ancestry and fossil record.\n'}]}]