Question: how many stones were used to build the statue of lincoln
[{'answer': 'twenty - eight', 'provenance': [{'wikipedia_id': '52369', 'title': 'Lincoln Memorial', 'start_paragraph_id': 26, 'start_character': 61, 'end_paragraph_id': 26, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Statue.\n'}]}]