Question: what kind of stone is the rosetta stone
[{'answer': 'granodiorite stele', 'provenance': [{'wikipedia_id': '26428', 'title': 'Rosetta Stone', 'start_paragraph_id': 1, 'start_character': 23, 'end_paragraph_id': 1, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '26428', 'title': 'Rosetta Stone', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 473, 'bleu_score': 0.677038177645455, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12927723809514701795}, 'section': 'Section::::Abstract.'}]}]