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Originally a radio comedy , this story became so popular that it has also appeared as a novel , film , television series , stage show , comic , audiobook , LP record , adventure game and online game , its ideas became popular references ( see Phrases from The Hitchhiker 's Guide to the Galaxy ) and has been translated into many languages .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None