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Cain then moved away from criminology to look at “ The main themes of Marx ’s and Engels ’ sociology of law ” then she returned to a look into policing when she wrote “ Racism , the police , and community policing : a comment on the Scarman Report ” .
 person: Cain; person: Marx; person: Engels
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Cain, Marx, Engels 
Answer:
 person: Cain; person: Marx; person: Engels