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Steiner studied composition with Walter Piston and Randall Thompson , cello with Gregor Piatigorsky and Leonard Rose , and conducting with Elaine Brown and Nadia Boulanger .
 Steiner, Walter Piston, Randall Thompson, Gregor Piatigorsky, Leonard Rose, Elaine Brown, Nadia Boulanger
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Steiner, Walter Piston, Randall Thompson, Gregor Piatigorsky, Leonard Rose, Elaine Brown, Nadia Boulanger