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: ["Brand", "UnapprovedDrug", "Drug", "DrugGroup"].

Please return the output as a JSON object of the format: {"Brand" : ["Aspirin", ...], "DrugGroup": ["Salicyclate", ...], "Drug": ["Phenobarbital", ...], "UnapprovedDrug": ["Heroin", ...]}. 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:

Aminosalicylic acid may decrease the amount of digoxin (Lanoxin, Lanoxicaps) that gets absorbed into your body. In the case that you are taking digoxin while taking aminosalicylic acid, higher doses of digoxin may be needed. Aminosalicylic acid may also decrease the absorption of vitamin B12, which can lead to a deficiency. Therefore you may need to take a vitamin B12 supplement while taking aminosalicylic acid.
{"Brand": ["Lanoxin"], "Drug": ["digoxin", "vitamin B12", "aminosalicylic acid", "Aminosalicylic acid", "Lanoxicaps"], "DrugGroup": [], "UnapprovedDrug": []}