Question: where did the math symbol pi come from
[{'answer': 'the lowercase Greek letter π', 'provenance': [{'wikipedia_id': '23601', 'title': 'Pi', 'start_paragraph_id': 7, 'start_character': 101, 'end_paragraph_id': 7, 'end_character': 130, 'bleu_score': 0.668740304976422, 'section': 'Section::::Fundamentals.:Name.\n'}]}, {'provenance': [{'wikipedia_id': '23601', 'title': 'Pi', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 498, 'bleu_score': 0.8417229955727571, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11822290520149187481}, 'section': 'Section::::Fundamentals.:Name.\n'}]}]