8478
Petra Langrova ( Czech Republic ) beat Karina Adams ( U.S. ) 6-4 6-2
 Petra Langrova, U.S., Karina Adams, Czech Republic
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:
 Petra Langrova, U.S., Karina Adams, Czech Republic