95880
He is the author of three books : Weak versus Strong Sustainability : Exploring the Limits of Two Opposing Paradigms , The pattern of aid giving : the impact of good governance on development assistance , and Greening trade and investment : environmental protection without protectionism .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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