4763
In 2000 he coupled with Nathan Robertson , but they too lost in the quarterfinals , this time to Tony Gunawan and Candra Wijaya of Indonesia .
 Nathan Robertson, Tony Gunawan, Candra Wijaya, Indonesia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Nathan Robertson, Tony Gunawan, Candra Wijaya, Indonesia