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As an undergraduate David Henige attended the University of Wisconsin of Toledo, Ohio in the 1960s, obtaining first a B.A. then a Master's degree in history. In 1967 he enrolled for postgraduate studies at UW-- Madison, completing a PhD in African History in 1973. Fieldwork towards his degree was undertaken in Ghana, West Africa. Henige's long association with the Memorial Library began during his PhD studies, where part of his time was spent working for the library.
 David Henige, University of Wisconsin
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 David Henige, University of Wisconsin