75663
He had been hired by 3M after graduation , but was called to active duty in the Navy during the Korean War .
 organization: 3M
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: 3M 
Answer:
 organization: 3M