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:

Etoposide-related myocardial infarction. The occurrence of a myocardial infarction is reported after chemotherapy containing etoposide, in a man with no risk factors for coronary heart disease. Possible causal mechanisms are discussed.
{"Chemical": ["Etoposide", "etoposide"], "Disease": ["myocardial infarction", "coronary heart disease"]}