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He has worked previously at Bell Laboratories , Rand Corporation and Rensselaer Polytechnic Institute .
 organization: Bell Laboratories; organization: Rand Corporation; organization: Rensselaer Polytechnic Institute
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: Bell Laboratories, Rand Corporation, Rensselaer Polytechnic Institute 
Answer:
 organization: Bell Laboratories; organization: Rand Corporation; organization: Rensselaer Polytechnic Institute