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The theremin had been in use since the 1920 s but it attained a degree of popular recognition through its use in science-fiction film soundtrack music in the 1950 s ( e.g. , Bernard Herrmann 's classic score for " The Day the Earth Stood Still " ) .
 Bernard Herrmann
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bernard Herrmann