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He continued to record in the 1990 s , also focusing on environmental issues by lending vocal support to space exploration and testifying in front of Congress in protest against censorship in music .
 location: Congress
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: Congress 
Answer:
 location: Congress