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Coauthor of the textbook Principles of Condensed Matter Physics ( ISBN 0-521-43224-3 ) with Paul Chaikin , Dr. Lubensky also was named to the Patricia M. Williams Term Chair at the University of Pennsylvania from 1995 to 1998 .
 Paul Chaikin, Lubensky, Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paul Chaikin, Lubensky, Pennsylvania