You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Disease", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Naloxone", ...], "Disease" : ["Hypotensive", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Fatal aplastic anemia following topical administration of ophthalmic chloramphenicol. A 73-year-old woman died of aplastic anemia less than two months after undergoing cataract extraction and beginning topical therapy with chloramphenicol. The first signs of pancytopenia began within one month of the surgery. The pattern of the aplastic anemia was associated with an idiosyncratic response to chloramphenicol. This was the second report of fatal aplastic anemia after topical treatment with chloramphenicol for ocular conditions, although two cases of reversible bone marrow hypoplasia have also been reported. Any other suspected cases of ocular toxicity associated with topically applied chloramphenicol should be reported to the National Registry of Drug-Induced Ocular Side Effects, Oregon Health Sciences University, Portland, OR 97201.
{"Chemical": ["chloramphenicol"], "Disease": ["aplastic anemia", "cataract", "pancytopenia", "bone marrow hypoplasia", "ocular toxicity"]}