192394
43 , written by Pyotr Ilyich Tchaikovsky in 1878 and 1879 .
 Pyotr Ilyich Tchaikovsky
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pyotr Ilyich Tchaikovsky