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In the aftermath of the Columbine High School massacre Brown represented RMGO in national news in support of gun rights amidst calls for more restrictions on firearms .
 person: Brown
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: Brown 
Answer:
 person: Brown