9465
Private property " in the terminology of Marx 's time , for Marx himself , and for Marxists sometimes today , does not mean the simple possessions of a person , but the ownership of productive property or property which produces a profit for the owner , such as corporate ownership , share ownership , land ownership , and - in the case of slave society - slave ownership ( since slaves work the land , mines and other means of producing the material means of existence ) .
 person: Marx; person: Marx
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: Marx; person: Marx