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Originally a four-year high school , MHS was a senior high school ( grades 10 – 12 ) for 46 years , beginning in 1966 .
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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:
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