Question: what part of the pig is used to make gelatin
[{'answer': 'skin', 'provenance': [{'wikipedia_id': '13160', 'title': 'Gelatin', 'start_paragraph_id': 11, 'start_character': 229, 'end_paragraph_id': 11, 'end_character': 233, 'bleu_score': 1.0, 'section': 'Section::::Research.:Digestibility.\n'}]}, {'provenance': [{'wikipedia_id': '13160', 'title': 'Gelatin', 'start_paragraph_id': 26, 'start_character': 0, 'end_paragraph_id': 26, 'end_character': 777, 'bleu_score': 0.9826823455989031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2997499761272038677}, 'section': 'Section::::Composition and properties.\n'}]}]