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Psychology professor Frans de Waal argues that rape involves both sex and violence , and that while A Natural History of Rape serves as a corrective to the dogmatic view that rape is primarily about power , its view that rape is primarily sexually motivated is equally dogmatic .
 Frans de Waal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Frans de Waal