339051
Early career Robert Lipka was assigned to the National Security Agency as an intelligence analyst in 1964 , when he was a 19 year old U.S. Army soldier .
 Lipka, National Security Agency
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lipka, National Security Agency