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William C. Clark (born 20 December 1948 in Greenwich , Connecticut) is an American ecologist and environmental policy analyst, and Harvey Brooks Professor of International Science, Public Policy and Human Development at the John F. Kennedy School of Government, Harvard University.
 place of birth: William C. Clark, Greenwich
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 place of birth: William C. Clark, Greenwich