309079
Daisy Archer is a trendy young Ph.D. student from the US who has won a research grant to fly to Belgrade to research the life of eccentric electrical pioneer and arch-rival to Thomas Edison , Nikola Tesla .
 Belgrade, Thomas Edison, Nikola Tesla
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belgrade, Thomas Edison, Nikola Tesla