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From 2002 to 2003 , research at Gedi continued to focus on urban development prior to the fifteenth century , with focus on a group of coral houses built by social elites in the site 's urban core .
 location: Gedi
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: Gedi 
Answer:
 location: Gedi