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:

Obsolete but dangerous antacid preparations. One case of acute hypercalcaemia and two of recurrent nephrolithiasis are reported in patients who had regularly consumed large amounts of calcium carbon-ate-sodium bicarbonate powders for more than 20 years. The powders had been obtained from pharmacists unknown to the patients' medical practitioners. It is suggested that these preparations were responsible for the patient's problems, and that such powders should no longer be freely obtainable.
{"Chemical": ["calcium carbon-ate", "sodium bicarbonate"], "Disease": ["nephrolithiasis", "hypercalcaemia"]}