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:

Production of autochthonous prostate cancer in Lobund-Wistar rats by treatments with N-nitroso-N-methylurea and testosterone. More than 50% of Lobund-Wistar (L-W) strain rats developed large, palpable prostate adenocarcinomas (PAs) following treatments with N-nitroso-N-methylurea (CAS: 684-93-5) and testosterone propionate [(TP) CAS: 57-85-2], and most of the tumor-bearing rats manifested metastatic lesions. The incubation periods averaged 10.6 months. Within the same timeframe, no L-W rat developed a similar palpable PA when treated only with TP. In L-W rats, TP acted as a tumor enhancement agent, with primary emphasis on the development of prostate cancer.
{"Chemical": ["TP", "testosterone propionate", "testosterone", "N-nitroso-N-methylurea"], "Disease": ["PAs", "prostate adenocarcinomas", "tumor", "PA", "prostate cancer"]}