Question: where is arachidonic acid found in the body
[{'answer': 'brain', 'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', 'start_paragraph_id': 6, 'start_character': 222, 'end_paragraph_id': 6, 'end_character': 227, 'bleu_score': 1.0, 'section': 'Section::::Biology.\n'}]}, {'answer': 'muscles', 'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', 'start_paragraph_id': 6, 'start_character': 229, 'end_paragraph_id': 6, 'end_character': 236, 'bleu_score': 1.0, 'section': 'Section::::Biology.\n'}]}, {'answer': 'liver', 'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', 'start_paragraph_id': 6, 'start_character': 242, 'end_paragraph_id': 6, 'end_character': 247, 'bleu_score': 1.0, 'section': 'Section::::Biology.\n'}]}, {'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 393, 'bleu_score': 0.9291747422288781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1605223548448755581}, 'section': 'Section::::Biology.\n'}]}, {'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', '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': 1605223548448755581}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '359884', 'title': 'Aristolochic acid', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['Aristolochic acids () are a family of carcinogenic, mutagenic, and nephrotoxic phytochemicals commonly found in the flowering plant family Aristolochiaceae (birthworts). Aristolochic acid (AA) I is the most abundant one. The family Aristolochiaceae includes the genera "Aristolochia" and "Asarum"', 'Aristolochic acids () are a family of carcinogenic, mutagenic, and nephrotoxic phytochemicals commonly found in the flowering plant family Aristolochiaceae (birthworts). Aristolochic acid (AA) I is the most abundant one. The family Aristolochiaceae includes the genera "Aristolochia" and "Asarum" (wild ginger), which are commonly used in Chinese herbal medicine. Although these compounds are widely associated with kidney problems, liver and urothelial cancers, the use of AA-containing plants for medicinal purposes has a long history. The FDA has issued warnings regarding consumption of AA-containing supplements.']}}]}, {'provenance': [{'wikipedia_id': '267909', 'title': 'Arachidonic acid', 'section': 'Section::::Biology.\n', 'start_paragraph_id': 6, 'end_paragraph_id': 6, 'meta': {'evidence_span': ["rachidonic acid is a polyunsaturated fatty acid present in the phospholipids (especially phosphatidylethanolamine, phosphatidylcholine, and phosphatidylinositides) of membranes of the body's cells, and is abundant in the brain, muscles, and liver. Skeletal muscle is an especially active site of", "Arachidonic acid is a polyunsaturated fatty acid present in the phospholipids (especially phosphatidylethanolamine, phosphatidylcholine, and phosphatidylinositides) of membranes of the body's cells, and is abundant in the brain, muscles, and liver. Skeletal muscle is an especially active site of arachidonic acid retention, accounting for roughly 10-20% of the phospholipid fatty acid content typically.", "Arachidonic acid is a polyunsaturated fatty acid present in the phospholipids (especially phosphatidylethanolamine, phosphatidylcholine, and phosphatidylinositides) of membranes of the body's cells, and is abundant in the brain, muscles, and liver."]}}]}]