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A source tells CNN ' s Nic Robertson , some Iraqi Republican Guard forces are gathering close to the airport .
 geographical social political: Iraqi; organization: CNN; organization: Republican Guard; person: A source; person: CNN ' s Nic Robertson; person: some Iraqi Republican Guard forces; facility: the airport
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 geographical social political: Iraqi; organization: CNN; organization: Republican Guard; person: A source; person: CNN ' s Nic Robertson; person: some Iraqi Republican Guard forces; facility: the airport