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: ["Chemical"].

Please return the output as a JSON object of the format: {"Chemical": ["Arsenic", ...]}. 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:

Interview with m frederick hawthorne. M Frederick Hawthorne is a world-renowned scientist in the field of molecular medicine and a pioneer in boron chemistry. He currently serves as the founding Director of the University of Missouri International Institute of Nano and Molecular Medicine (MO, USA). Prof. Hawthorne is a University of Missouri Curators' Distinguished Professor and University Professor of Chemistry Emeritus of the University of California, Los Angeles (CA, USA). He is a member of the US National Academy of Sciences and the recipient of many national and international honors, including the 2003 King Faisal Prize in Science, the American Chemical Society's 2009 Priestley Medal and the 2011 National Medal of Science. Prof. Hawthorne has authored or co-authored more than 540 research articles, 30 patents, ten book chapters and two books. Prof. Hawthorne spoke to Future Medicinal Chemistry on how he became involved in the field, the future of boron neutron capture therapy, and provides his advice for the next generation of boron scientists. Interview conducted by Isaac Bruce, Managing Commissioning Editor.
{"Chemical": ["boron"]}