39979
In Ovid 's " Metamorphoses " , there are three people named Cygnus , all of whom are transformed into swans .
 Ovid, Cygnus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ovid, Cygnus