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At the same time , the district 's two middle schools , North Middle and East Middle , were merged to form Alton Middle School , which is located at Alton High School 's former campus .
 organization: Alton; organization: Alton
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: Alton, Alton 
Answer:
 organization: Alton; organization: Alton