Question: Where was the author of "A Mercy" a professor emerita at?
Context: Cosmo (born 2002/2003) is an African Grey Parrot who by the age of six had learned more than 200 words.  She lives with Betty Jean Craige, who is University Professor Emerita of comparative literature and Director Emerita of the Willson Center for Humanities and Arts at the University of Georgia. Toni Morrison (born Chloe Ardelia Wofford; February 18, 1931) is an American novelist, editor, teacher, and professor emerita at Princeton University. Margaret A. Farley, R.S.M., Ph.D., (born April 15, 1935) is an American member of the Roman Catholic Sisters of Mercy, is Gilbert L. Stark Professor Emerita of Christian Ethics at Yale University Divinity School.  She taught Christian ethics at Yale Divinity School from 1971 to 2007. Theodora Emily Colborn(née Decker; March 28, 1927 – December 14, 2014) was Founder and President Emerita of The Endocrine Disruption Exchange (TEDX), based in Paonia, Colorado, and Professor Emerita of Zoology at the University of Florida, Gainesville.  She was an environmental health analyst, and best known for her studies on the health effects of endocrine disrupting chemicals.  She died in 2014. Elizabeth Edwards, {'1': ", '2': ", '3': ", '4': "} (born 24 February 1952) is a visual and historical anthropologist.  She is Professor Emerita of Photographic History at De Montfort University; Curator Emerita at Pitt River Museum, University of Oxford; Research Associate at the Institute of Social and Cultural Anthropology, University of Oxford; and Honorary Professor in the Department of Anthropology at University College London.  In 2017 she was appointed the Andrew W. Mellon Visiting Professor at the V&A Research Institute, London.  Her focus of research is the relationship between photography, history and anthropology, and includes investigations of photography and historical imagination, the social practices of photography, and the materiality of photographs. Linda Threadgill (born 1947) is an American artist whose primary emphasis is metalsmithing.  Born in Corpus Christi, TX, her early interests in art explored both ceramics and painting.  She became interested in working with metal while an undergraduate, and received a Bachelor of Fine Arts degree from the University of Georgia in 1970, where she studied with noted American metalsmith Robert Ebendorf.  A portfolio of work based on her experimentation with photo-etching and electroforming led her to study with innovative metalsmith Stanley Lechtzin at the Tyler School of Art in Philadelphia, where she was awarded the Teaching Assistantship in the Metals Department, and earned a Master of Fine Arts degree in 1978.  In 1979, she was awarded a Florida Fine Arts Council Individual Artist Fellowship based on her studio work.  Later this same year, she was invited to join the faculty of the Art Department at the University of Wisconsin-Whitewater.  In 1983 she was named a Distinguished Member of the Society of North American Goldsmiths, and in 1984, received a National Endowment for the Arts Visual Arts Fellowship.  In 1994, she received the University of Wisconsin-Whitewater Chancellor's Award for Outstanding Research.  During her tenure on the faculty of the University of Wisconsin, she also received 11 University of Wisconsin Faculty Research Grants, and was awarded the University of Wisconsin Outstanding Research Award in 1987, 1995 and 1999.  She served as a Craftsman Trustee to the American Craft Council from 1996-1999, and in 2000, she was designated Trustee Emerita.  In 2001, she was named an Artisan Member of the Society of American Silversmiths.  She headed the Metals Program at the University of Wisconsin-Whitewater from 1979-2003, and is Professor Emerita.  In 2005 she was named a Fellow of the American Craft Council. A Mercy is Toni Morrison's ninth novel.  It was published in 2008.  "A Mercy" reveals what lies beneath the surface of slavery in early America.  It is both the story of mothers and daughters and the story of a primitive America.  It made the "New York Times Book Review" list of "10 Best Books of 2008" as chosen by the paper's editors.  In Fall 2010 it was chosen for the One Book, One Chicago program. Susan K. Avery (born 1950) is an American atmospheric physicist and President Emerita of the Woods Hole Oceanographic Institution (WHOI) in Massachusetts, where she led the marine science and engineering research organization from 2008-2015.  She was the ninth president and director and the first woman to hold the leadership role at WHOI.  She is Professor Emerita at the University of Colorado, Boulder (UCB), where she served on the faculty from 1982-2008.  While at UCB she also served in various administrative positions, including director of the Cooperative Institute for Research in Environmental Sciences (CIRES), a 550-member collaborative institute between UCB and the National Oceanic and Atmospheric Administration (NOAA) (1994-2004); and interim positions (2004-2007) as vice chancellor for research and dean of the graduate school, and provost and executive vice chancellor for academic affairs.  Currently she is a senior fellow at the Consortium for Ocean Leadership in Washington, D.C. Caroline Walker Bynum, FBA (born in Atlanta, Georgia, in 1941) is an American Medieval scholar.  She is a University Professor emerita at Columbia University and Professor emerita of Western Medieval History at the Institute for Advanced Study in Princeton, New Jersey.  She was the first woman to be appointed University Professor at Columbia.  She is a former Dean of Columbia's School of General Studies, and served as President of the American Historical Association in 1996. Sarah Lee Lippincott (born October 26, 1920) also known as "Sarah Lee Lippincott Zimmerman" is an American astronomer.  She is Professor Emerita of Astronomy at Swarthmore College and Director Emerita of the college's Sproul Observatory.
Answer: Princeton University