Question: what type of rock is old harry made from
[{'answer': 'chalk', 'provenance': [{'wikipedia_id': '849361', 'title': 'Old Harry Rocks', 'start_paragraph_id': 1, 'start_character': 26, 'end_paragraph_id': 1, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '849361', 'title': 'Old Harry Rocks', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 799, 'bleu_score': 0.986253478180058, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17646053815193259712}, 'section': 'Section::::Formation.\n'}]}]