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:

Postinfarction ventricular septal defect associated with long-term steroid therapy. Two cases of postinfarction ventricular septal rupture in patients on long-term steroid therapy are presented and the favourable outcome in both cases described. A possible association between steroid therapy and subsequent postinfarction septal rupture is discussed.
{"Chemical": ["steroid"], "Disease": ["ventricular septal defect", "ventricular septal rupture", "septal rupture"]}