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The Research Institute of Petroleum Industry , also known as NIOC-RIPI , often shortened to RIPI ( ) is a governmental research institute founded in 1959 in Tehran , Iran and is affiliated with National Iranian Oil Company .
 Tehran, Iran, National Iranian Oil Company
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tehran, Iran, National Iranian Oil Company