Question: when did the north african elephant became extinct
[{'answer': 'in Roman times', 'provenance': [{'wikipedia_id': '12784278', 'title': 'North African elephant', 'start_paragraph_id': 1, 'start_character': 248, 'end_paragraph_id': 1, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12784278', 'title': 'North African elephant', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 719, 'bleu_score': 0.9575690457118191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1771399381275290572}, 'section': 'Section::::Abstract.'}]}]