76705
Africa Asia Europe North America United States Oceania South America Planetarium computer software Since the invention of the personal computer , the planetarium concept has been extended to include software that displays a realistic sky image .
 Planetarium
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Planetarium