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Jacobson was a socialist who became involved in political causes , protesting at the White House against the planned execution of Julius and Ethel Rosenberg .
 person: Jacobson
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: Jacobson 
Answer:
 person: Jacobson