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Alexander , also known as PhoneSat 2.0 Beta or PhoneSat v2a is a technology demonstration satellite operated by NASA 's Ames Research Center , which was launched in April 2013 .
 Alexander, NASA, Ames Research Center
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexander, NASA, Ames Research Center