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: ["Protein", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Dexamethasone", ...], "Protein" : ["BRCA-1", ...]}. 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:

The unexpected side effects of new nonsteroidal anti-inflammatory drugs.
Conventional nonselective NSAIDs are classically associated with a risk of gastrointestinal disorders. These drugs have a broad range of relative selectivity towards the COX family, mainly towards two isoforms of these enzymes: COX-1 and -2. As examples, ketorolac, flurbiprofen, ketoprofen and indomethacin have increased COX-1 selectivity when compared with naproxen and ibuprofen.
{"Chemical": ["ketorolac", "naproxen", "indomethacin", "flurbiprofen", "ibuprofen", "ketoprofen"], "Protein": ["COX", "COX-1 and -2", "COX-1"]}