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That work has evolved with Professor Agrawal becoming the principle investigator in the NSF sponsored Solar Economy IGERT involving researchers at Purdue University , University of Delaware , UTEP , and HZB .
 Purdue University, University of Delaware, UTEP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Purdue University, University of Delaware, UTEP