174015
In 1995 , he became assistant professor of chemical engineering at Michigan Tech and promoted to associate professor in 1998 .
 organization: Michigan Tech
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: Michigan Tech 
Answer:
 organization: Michigan Tech