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On 18 April , rebels assassinated Ali Ballan , head of public relations at the Ministry of Social Affairs and a member of Syria 's relief agency , in a restaurant at Mazzeh district .
 None
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:  
Answer:
 None