Question: Hubert Aaronson was a R.F. Mehl University Professor Emeritus at a private research university located in what city in Pennsylvania?

Context paragraphs:
John Carbon: John A. Carbon, Ph.D. is a Professor Emeritus of molecular and cellular biology at the University of California, Santa Barbara.  He earned his B.S. degree in Chemistry in 1952 at the University of Illinois, and his Ph.D. degree in Biochemistry in 1955 from Northwestern University.  He did basic research developing new anticancer drugs at Abbott Laboratories (North Chicago, IL) for 12 years (1956-1968).  He joined the faculty of the University of California, Santa Barbara in 1968, and became Professor Emeritus in 1999.  His research contributions include elucidation of the mechanism of genetic missense suppression in bacteria, the development of techniques to make genomic libraries using recombinant DNA, techniques for using yeast for DNA cloning, characterization of centromere DNA, and construction of the first artificial chromosomes.  Many of his later research contributions were carried out in collaboration with his wife, Professor Louise B. Clarke.  He was elected to membership in the United States National Academy of Sciences and the American Academy of Arts and Sciences in 1986.  Carbon was among the founding scientific advisors of the Amgen Corporation.  An endowed chair in Biochemistry and Molecular Biology at UC Santa Barbara was named for Carbon.  The chair is currently held by Jamey Marth.

George A. Bray: George A. Bray is an American obesity researcher.  As of 2016, he is a University Professor emeritus and formerly the chief of the division of clinical obesity and metabolism at Louisiana State University's Pennington Biomedical Research Center (PBRC) in Baton Rouge.  He is also a Boyd Professor emeritus at PBRC, and a professor of medicine emeritus at the Louisiana State University Medical Center.

Hubert Aaronson: Hubert Aaronson (1924–2005) was a R.F. Mehl University Professor Emeritus at Carnegie Mellon University.

Issac Koga: Issac (Issaku) Koga was born on December 5, 1899 in Tashiro Village (now Tosu) in Saga Prefecture, Japan, the eldest of 7 children.  In July 1920, at the age of 20 he started to study at the Department of Electrical Engineering of Tokyo Imperial University (later renamed University of Tokyo).  After graduation in August 1925, he moved to the new Tokyo City Electrical Institute, which was established to develop and promote radio broadcasting technology under the directorship of Kujirai Kotaro, a pioneer of research and teaching of radio science.  Initially an engineer, he became an assistant professor in 1929.  Under the guidance of Prof. Kotaro he studied crystal oscillators, forming the basis of his PhD thesis, completed in April 1930, entitled "Characteristics of the crystal oscillator".  This work included making the first quartz tuning forks in 1927.  In 1929 he became an associate professor of Tokyo Institute of Technology and professor in 1939.  He became a professor emeritus of Tokyo Institute of Technology in 1961.  In 1944, he worked as a concurrent professor at University of Tokyo and later became a professor emeritus.

Britton Chance: Britton Chance (July 24, 1913 – November 16, 2010) was the Eldridge Reeves Johnson University Professor Emeritus of Biochemistry and Biophysics, as well as Professor Emeritus of Physical Chemistry and Radiological Physics at the University of Pennsylvania School of Medicine.

Carnegie Mellon University: Carnegie Mellon University (Carnegie Mellon or CMU or ) is a private research university in Pittsburgh, Pennsylvania.

Robert Lima: Robert Lima is an American, poet, literary critic, bibliographer, playwright, editor, biographer, and translator.  He is a professor emeritus of Spanish and Comparative Literatures at Pennsylvania State University, as well as fellow emeritus of the Institute for the Arts and Humanistic Studies.  Lima is an academician of the "Academia Norteamericana de la Lengua Española" and a corresponding member of the Real Academia Española.  Honored as a distinguished alumnus by Villanova University, he was inducted into the "Enxebre Orden da Vieira" in Spain and dubbed Knight Commander in the Order of Queen Isabel of Spain by King Juan Carlos I.  His 40-year career as a university professor and writer was heralded in "A Confluence of Words.  Studies in Honor of Robert Lima", published by Juan de la Cuesta Hispanic Monographs in 2011

Criminology (journal): Criminology is a peer-reviewed academic journal published quarterly by Wiley-Blackwell on behalf of the American Society of Criminology.  The editor-in-chief is Wayne Osgood (professor emeritus of criminology and sociology at the Pennsylvania State University).  The co-editors are Eric P. Baumer (professor of sociology and criminology at the Pennsylvania State University) and Rosemary Gartner (professor emeritus of criminology at the University of Toronto).  The journal covers research in criminology, penology, and criminal justice and is the flagship journal of ASC.

University of Southern California: The University of Southern California (USC or SC) is a private research university located in Los Angeles, California.  Founded in 1880, it is the oldest private research university in California.  USC has historically educated a large number of the region's business leaders and professionals.  In recent decades, the university has also leveraged its location in Los Angeles to establish relationships with research and cultural institutions throughout Asia and the Pacific Rim.  An engine for economic activity, USC contributes $8 billion annually to the economy of the Los Angeles metropolitan area and California.

Donald Keene: Donald Lawrence Keene (born June 18, 1922) is an American-born Japanese scholar, historian, teacher, writer and translator of Japanese literature.  Keene is University Professor Emeritus and Shincho Professor Emeritus of Japanese Literature at Columbia University, where he taught for over fifty years.  Soon after the 2011 Tōhoku earthquake and tsunami, he retired from Columbia, moved to Japan permanently, and acquired citizenship under the name Kīn Donarudo (キーン　ドナルド, "Donald Keene" in the Japanese name order) .

Supporting paragraphs: Hubert Aaronson Carnegie Mellon University
Answer: Pittsburgh