80361
Adams and Bollegraf lost in the quarterfinals to Serena Williams and Venus Williams .
 Adams, Bollegraf, Serena Williams, Venus Williams
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Adams, Bollegraf, Serena Williams, Venus Williams