1339
National Geographic introduced an international channel in September 1997 that is in 115 countries and reaches 85 million homes .
 115 countries, National Geographic, 85 million homes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 115 countries, National Geographic, 85 million homes