7708
Christopher Reeve -- Reeve was best known for playing the comic book hero Superman in four movies but his greatest heroics came in real life .
 Christopher Reeve, Reeve, Superman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Christopher Reeve, Reeve, Superman