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:

Hepatic adenomas and focal nodular hyperplasia of the liver in young women on oral contraceptives: case reports. Two cases of hepatic adenoma and one of focal nodular hyperplasia presumably associated with the use of oral contraceptives, are reported. Special reference is made to their clinical presentation, which may be totally asymptomatic. Liver-function tests are of little diagnostic value, but valuable information may be obtained from both liver scanning and hepatic angiography. Histologic differences and clinical similarities between hepatic adenoma and focal nodular hyperplasia of the liver are discussed.
{"Chemical": ["oral contraceptives"], "Disease": ["adenomas", "focal nodular hyperplasia", "adenoma"]}