289604
Background Iphigénie en Tauride marked the climax of the quarrel between the supporters of Piccinni and those of Christoph Willibald Gluck .
 Piccinni, Christoph Willibald Gluck
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Piccinni, Christoph Willibald Gluck