Question: who commissioned the great pyramid of giza to be built
[{'answer': 'Fourth Dynasty Egyptian pharaoh Khufu', 'provenance': [{'wikipedia_id': '12224', 'title': 'Great Pyramid of Giza', 'start_paragraph_id': 2, 'start_character': 83, 'end_paragraph_id': 2, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '12224', 'title': 'Great Pyramid of Giza', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 612, 'bleu_score': 0.6615434432522831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 938771609952054257}, 'section': 'Section::::History and description.\n'}]}]