51566
Even more significantly , at Heidelberg he became friends with another young Lutheran scholar , Carl Braaten , who would later become his " chief theological companion " and his most important theological collaborator .
 location: Heidelberg; person: Carl Braaten
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: Heidelberg, Carl Braaten 
Answer:
 location: Heidelberg; person: Carl Braaten