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According to Robert D. Putnam , " social capital " refers to " connections among individuals – social networks and the norms of reciprocity and trustworthiness that arise from them .
 person: Robert D. Putnam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Robert D. Putnam