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in this book , the coptic egyptian poet returns to his cultural roots and the legacy of strength so necessary to confront the hostilities against entire communities because of language , nationhood or religion .
 product producer: book, poet
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  book, poet 
Answer:
 product producer: book, poet