Question: fatehpur sikri is made up of which rock
[{'answer': 'red sandstone', 'provenance': [{'wikipedia_id': '322997', 'title': 'Fatehpur Sikri', 'start_paragraph_id': 16, 'start_character': 135, 'end_paragraph_id': 16, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Architecture.\n'}]}, {'provenance': [{'wikipedia_id': '322997', 'title': 'Fatehpur Sikri', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 583, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17994934406264367132}, 'section': 'Section::::Architecture.\n'}]}]