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Established in 2004 , RPGS specializes in the engineering , design and implementation of communications systems for the US Department of Homeland security and other public safety agencies .
 organization: Homeland
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: Homeland 
Answer:
 organization: Homeland