Question: what is the membrane on the surface of the stomach called
[{'answer': 'Serous Membrane', 'provenance': [{'wikipedia_id': '1425177', 'title': 'Serous membrane', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the visceral membrane', 'provenance': [{'wikipedia_id': '1425177', 'title': 'Serous membrane', 'start_paragraph_id': 1, 'start_character': 209, 'end_paragraph_id': 1, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'serous membrane ( or serosa )'}, {'provenance': [{'wikipedia_id': '1425177', 'title': 'Serous membrane', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 498, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1944762871462736012}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1425177', 'title': 'Serous membrane', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1944762871462736012}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1425177', 'title': 'Serous membrane', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['In anatomy, serous membrane (or serosa) is a smooth tissue membrane consisting of two layers of mesothelium, which secrete serous fluid. The inner layer that covers organs (viscera) in body cavities is called the visceral membrane. A second layer of epithelial cells of the serous membrane, called the parietal layer, lines the body wall', 'In anatomy, serous membrane (or serosa) is a smooth tissue membrane consisting of two layers of mesothelium, which secrete serous fluid. The inner layer that covers organs (viscera) in body cavities is called the visceral membrane. A second layer of epithelial cells of the serous membrane, called the parietal layer, lines the body wall. Between the two layers is a potential space, mostly empty except for a few milliliters of lubricating serous fluid that is secreted by the two serous membranes.']}}]}]